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Finding the Fourth Proportional to 586.62, 807.87 and 487.47

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Solution

The fourth proportional to 586.62, 807.87 and 487.47 is: 671.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.62 : 807.87 = 487.47 : x
  2. Step 2: Convert to fraction form
    586.62/807.87 = 487.47/x
  3. Step 3: Cross multiply
    586.62x = 807.87 × 487.47
  4. Step 4: Simplify right side
    586.62x = 393,812.39
  5. Step 5: Solve for x
    x = 393,812.39/586.62
  6. Step 6: Final answer
    x = 671.32

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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.