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Finding the Fourth Proportional to 658.55, 985.80 and 622.10

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Solution

The fourth proportional to 658.55, 985.80 and 622.10 is: 931.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.55 : 985.80 = 622.10 : x
  2. Step 2: Convert to fraction form
    658.55/985.80 = 622.10/x
  3. Step 3: Cross multiply
    658.55x = 985.80 × 622.10
  4. Step 4: Simplify right side
    658.55x = 613,266.18
  5. Step 5: Solve for x
    x = 613,266.18/658.55
  6. Step 6: Final answer
    x = 931.24

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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.