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Finding the Fourth Proportional to 437.71, 656.08 and 386.47

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Solution

The fourth proportional to 437.71, 656.08 and 386.47 is: 579.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.71 : 656.08 = 386.47 : x
  2. Step 2: Convert to fraction form
    437.71/656.08 = 386.47/x
  3. Step 3: Cross multiply
    437.71x = 656.08 × 386.47
  4. Step 4: Simplify right side
    437.71x = 253,553.31
  5. Step 5: Solve for x
    x = 253,553.31/437.71
  6. Step 6: Final answer
    x = 579.28

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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.