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Finding the Fourth Proportional to 602, 831.20 and 470.76

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Solution

The fourth proportional to 602, 831.20 and 470.76 is: 649.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    602 : 831.20 = 470.76 : x
  2. Step 2: Convert to fraction form
    602/831.20 = 470.76/x
  3. Step 3: Cross multiply
    602x = 831.20 × 470.76
  4. Step 4: Simplify right side
    602x = 391,295.71
  5. Step 5: Solve for x
    x = 391,295.71/602
  6. Step 6: Final answer
    x = 649.99

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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.