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Finding the Fourth Proportional to 487,808.62, 672,731.07 and 418,876.43

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Solution

The fourth proportional to 487,808.62, 672,731.07 and 418,876.43 is: 577,667.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,808.62 : 672,731.07 = 418,876.43 : x
  2. Step 2: Convert to fraction form
    487,808.62/672,731.07 = 418,876.43/x
  3. Step 3: Cross multiply
    487,808.62x = 672,731.07 × 418,876.43
  4. Step 4: Simplify right side
    487,808.62x = 281,791,186,539.98
  5. Step 5: Solve for x
    x = 281,791,186,539.98/487,808.62
  6. Step 6: Final answer
    x = 577,667.50

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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.