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Finding the Fourth Proportional to 521,526.60, 721,022.92 and 385,345.76

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Solution

The fourth proportional to 521,526.60, 721,022.92 and 385,345.76 is: 532,749.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,526.60 : 721,022.92 = 385,345.76 : x
  2. Step 2: Convert to fraction form
    521,526.60/721,022.92 = 385,345.76/x
  3. Step 3: Cross multiply
    521,526.60x = 721,022.92 × 385,345.76
  4. Step 4: Simplify right side
    521,526.60x = 277,843,120,516.34
  5. Step 5: Solve for x
    x = 277,843,120,516.34/521,526.60
  6. Step 6: Final answer
    x = 532,749.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.