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Finding the Fourth Proportional to 621.27, 931.10 and 514.35

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Solution

The fourth proportional to 621.27, 931.10 and 514.35 is: 770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.27 : 931.10 = 514.35 : x
  2. Step 2: Convert to fraction form
    621.27/931.10 = 514.35/x
  3. Step 3: Cross multiply
    621.27x = 931.10 × 514.35
  4. Step 4: Simplify right side
    621.27x = 478,908.71
  5. Step 5: Solve for x
    x = 478,908.71/621.27
  6. Step 6: Final answer
    x = 770.85

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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.