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Finding the Fourth Proportional to 578,414.80, 869,695.80 and 487,176.40

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Solution

The fourth proportional to 578,414.80, 869,695.80 and 487,176.40 is: 732,511.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,414.80 : 869,695.80 = 487,176.40 : x
  2. Step 2: Convert to fraction form
    578,414.80/869,695.80 = 487,176.40/x
  3. Step 3: Cross multiply
    578,414.80x = 869,695.80 × 487,176.40
  4. Step 4: Simplify right side
    578,414.80x = 423,695,268,939.12
  5. Step 5: Solve for x
    x = 423,695,268,939.12/578,414.80
  6. Step 6: Final answer
    x = 732,511.11

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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.