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Finding the Fourth Proportional to 513,520.56, 708,645.12 and 284,071.86

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Solution

The fourth proportional to 513,520.56, 708,645.12 and 284,071.86 is: 392,011.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,520.56 : 708,645.12 = 284,071.86 : x
  2. Step 2: Convert to fraction form
    513,520.56/708,645.12 = 284,071.86/x
  3. Step 3: Cross multiply
    513,520.56x = 708,645.12 × 284,071.86
  4. Step 4: Simplify right side
    513,520.56x = 201,306,137,318.32
  5. Step 5: Solve for x
    x = 201,306,137,318.32/513,520.56
  6. Step 6: Final answer
    x = 392,011.84

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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.