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Finding the Fourth Proportional to 924.80, 1,275.84 and 613.76

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Solution

The fourth proportional to 924.80, 1,275.84 and 613.76 is: 846.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.80 : 1,275.84 = 613.76 : x
  2. Step 2: Convert to fraction form
    924.80/1,275.84 = 613.76/x
  3. Step 3: Cross multiply
    924.80x = 1,275.84 × 613.76
  4. Step 4: Simplify right side
    924.80x = 783,059.56
  5. Step 5: Solve for x
    x = 783,059.56/924.80
  6. Step 6: Final answer
    x = 846.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.