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Finding the Fourth Proportional to 602.52, 831.72 and 455.20

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Solution

The fourth proportional to 602.52, 831.72 and 455.20 is: 628.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.52 : 831.72 = 455.20 : x
  2. Step 2: Convert to fraction form
    602.52/831.72 = 455.20/x
  3. Step 3: Cross multiply
    602.52x = 831.72 × 455.20
  4. Step 4: Simplify right side
    602.52x = 378,598.94
  5. Step 5: Solve for x
    x = 378,598.94/602.52
  6. Step 6: Final answer
    x = 628.36

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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.