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Finding the Fourth Proportional to 407.62, 563.37 and 392.26

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Solution

The fourth proportional to 407.62, 563.37 and 392.26 is: 542.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.62 : 563.37 = 392.26 : x
  2. Step 2: Convert to fraction form
    407.62/563.37 = 392.26/x
  3. Step 3: Cross multiply
    407.62x = 563.37 × 392.26
  4. Step 4: Simplify right side
    407.62x = 220,987.52
  5. Step 5: Solve for x
    x = 220,987.52/407.62
  6. Step 6: Final answer
    x = 542.14

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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.