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Finding the Fourth Proportional to 646,712.80, 970,069.20 and 553,400.80

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Solution

The fourth proportional to 646,712.80, 970,069.20 and 553,400.80 is: 830,101.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,712.80 : 970,069.20 = 553,400.80 : x
  2. Step 2: Convert to fraction form
    646,712.80/970,069.20 = 553,400.80/x
  3. Step 3: Cross multiply
    646,712.80x = 970,069.20 × 553,400.80
  4. Step 4: Simplify right side
    646,712.80x = 536,837,071,335.36
  5. Step 5: Solve for x
    x = 536,837,071,335.36/646,712.80
  6. Step 6: Final answer
    x = 830,101.20

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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.