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Finding the Fourth Proportional to 602.21, 831.17 and 392.02

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Solution

The fourth proportional to 602.21, 831.17 and 392.02 is: 541.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.21 : 831.17 = 392.02 : x
  2. Step 2: Convert to fraction form
    602.21/831.17 = 392.02/x
  3. Step 3: Cross multiply
    602.21x = 831.17 × 392.02
  4. Step 4: Simplify right side
    602.21x = 325,834.17
  5. Step 5: Solve for x
    x = 325,834.17/602.21
  6. Step 6: Final answer
    x = 541.06

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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.