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Finding the Fourth Proportional to 664,129, 996,193.50 and 220,897

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Solution

The fourth proportional to 664,129, 996,193.50 and 220,897 is: 331,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,129 : 996,193.50 = 220,897 : x
  2. Step 2: Convert to fraction form
    664,129/996,193.50 = 220,897/x
  3. Step 3: Cross multiply
    664,129x = 996,193.50 × 220,897
  4. Step 4: Simplify right side
    664,129x = 220,056,155,569.50
  5. Step 5: Solve for x
    x = 220,056,155,569.50/664,129
  6. Step 6: Final answer
    x = 331,345.50

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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.