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Finding the Fourth Proportional to 664,010,647.20, 996,015,970.80 and 654,940,720.80

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Solution

The fourth proportional to 664,010,647.20, 996,015,970.80 and 654,940,720.80 is: 982,411,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,010,647.20 : 996,015,970.80 = 654,940,720.80 : x
  2. Step 2: Convert to fraction form
    664,010,647.20/996,015,970.80 = 654,940,720.80/x
  3. Step 3: Cross multiply
    664,010,647.20x = 996,015,970.80 × 654,940,720.80
  4. Step 4: Simplify right side
    664,010,647.20x = 652,331,417,844,063,616
  5. Step 5: Solve for x
    x = 652,331,417,844,063,616/664,010,647.20
  6. Step 6: Final answer
    x = 982,411,081.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.