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Finding the Fourth Proportional to 672.61, 928.46 and 602.55

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Solution

The fourth proportional to 672.61, 928.46 and 602.55 is: 831.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.61 : 928.46 = 602.55 : x
  2. Step 2: Convert to fraction form
    672.61/928.46 = 602.55/x
  3. Step 3: Cross multiply
    672.61x = 928.46 × 602.55
  4. Step 4: Simplify right side
    672.61x = 559,443.57
  5. Step 5: Solve for x
    x = 559,443.57/672.61
  6. Step 6: Final answer
    x = 831.75

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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.