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Finding the Fourth Proportional to 913.20, 1,366.56 and 624.84

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Solution

The fourth proportional to 913.20, 1,366.56 and 624.84 is: 935.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.20 : 1,366.56 = 624.84 : x
  2. Step 2: Convert to fraction form
    913.20/1,366.56 = 624.84/x
  3. Step 3: Cross multiply
    913.20x = 1,366.56 × 624.84
  4. Step 4: Simplify right side
    913.20x = 853,881.35
  5. Step 5: Solve for x
    x = 853,881.35/913.20
  6. Step 6: Final answer
    x = 935.04

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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.