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Finding the Fourth Proportional to 474.59, 710.13 and 405.20

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Solution

The fourth proportional to 474.59, 710.13 and 405.20 is: 606.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.59 : 710.13 = 405.20 : x
  2. Step 2: Convert to fraction form
    474.59/710.13 = 405.20/x
  3. Step 3: Cross multiply
    474.59x = 710.13 × 405.20
  4. Step 4: Simplify right side
    474.59x = 287,747.97
  5. Step 5: Solve for x
    x = 287,747.97/474.59
  6. Step 6: Final answer
    x = 606.31

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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.