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Finding the Fourth Proportional to 521,569.10, 780,604.05 and 521,569.10

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Solution

The fourth proportional to 521,569.10, 780,604.05 and 521,569.10 is: 780,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,569.10 : 780,604.05 = 521,569.10 : x
  2. Step 2: Convert to fraction form
    521,569.10/780,604.05 = 521,569.10/x
  3. Step 3: Cross multiply
    521,569.10x = 780,604.05 × 521,569.10
  4. Step 4: Simplify right side
    521,569.10x = 407,138,951,814.86
  5. Step 5: Solve for x
    x = 407,138,951,814.86/521,569.10
  6. Step 6: Final answer
    x = 780,604.05

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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.