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Finding the Fourth Proportional to 407.80, 562.36 and 314.31

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Solution

The fourth proportional to 407.80, 562.36 and 314.31 is: 433.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.80 : 562.36 = 314.31 : x
  2. Step 2: Convert to fraction form
    407.80/562.36 = 314.31/x
  3. Step 3: Cross multiply
    407.80x = 562.36 × 314.31
  4. Step 4: Simplify right side
    407.80x = 176,753.80
  5. Step 5: Solve for x
    x = 176,753.80/407.80
  6. Step 6: Final answer
    x = 433.44

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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.