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Finding the Fourth Proportional to 479,700.80, 718,757.28 and 430,252.16

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Solution

The fourth proportional to 479,700.80, 718,757.28 and 430,252.16 is: 644,666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,700.80 : 718,757.28 = 430,252.16 : x
  2. Step 2: Convert to fraction form
    479,700.80/718,757.28 = 430,252.16/x
  3. Step 3: Cross multiply
    479,700.80x = 718,757.28 × 430,252.16
  4. Step 4: Simplify right side
    479,700.80x = 309,246,872,235.73
  5. Step 5: Solve for x
    x = 309,246,872,235.73/479,700.80
  6. Step 6: Final answer
    x = 644,666.16

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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.