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Finding the Fourth Proportional to 614.06, 922.80 and 422.90

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Solution

The fourth proportional to 614.06, 922.80 and 422.90 is: 635.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.06 : 922.80 = 422.90 : x
  2. Step 2: Convert to fraction form
    614.06/922.80 = 422.90/x
  3. Step 3: Cross multiply
    614.06x = 922.80 × 422.90
  4. Step 4: Simplify right side
    614.06x = 390,252.12
  5. Step 5: Solve for x
    x = 390,252.12/614.06
  6. Step 6: Final answer
    x = 635.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.