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Finding the Fourth Proportional to 613.68, 916.20 and 527.04

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Solution

The fourth proportional to 613.68, 916.20 and 527.04 is: 786.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.68 : 916.20 = 527.04 : x
  2. Step 2: Convert to fraction form
    613.68/916.20 = 527.04/x
  3. Step 3: Cross multiply
    613.68x = 916.20 × 527.04
  4. Step 4: Simplify right side
    613.68x = 482,874.05
  5. Step 5: Solve for x
    x = 482,874.05/613.68
  6. Step 6: Final answer
    x = 786.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.