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Finding the Fourth Proportional to 656.47, 906.42 and 432.49

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Solution

The fourth proportional to 656.47, 906.42 and 432.49 is: 597.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.47 : 906.42 = 432.49 : x
  2. Step 2: Convert to fraction form
    656.47/906.42 = 432.49/x
  3. Step 3: Cross multiply
    656.47x = 906.42 × 432.49
  4. Step 4: Simplify right side
    656.47x = 392,017.59
  5. Step 5: Solve for x
    x = 392,017.59/656.47
  6. Step 6: Final answer
    x = 597.16

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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.