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Finding the Fourth Proportional to 531,418.32, 797,126.40 and 215,801.28

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Solution

The fourth proportional to 531,418.32, 797,126.40 and 215,801.28 is: 323,701.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,418.32 : 797,126.40 = 215,801.28 : x
  2. Step 2: Convert to fraction form
    531,418.32/797,126.40 = 215,801.28/x
  3. Step 3: Cross multiply
    531,418.32x = 797,126.40 × 215,801.28
  4. Step 4: Simplify right side
    531,418.32x = 172,020,897,441.79
  5. Step 5: Solve for x
    x = 172,020,897,441.79/531,418.32
  6. Step 6: Final answer
    x = 323,701.48

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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.