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Finding the Fourth Proportional to 1,708.76, 2,563.52 and 613.92

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Solution

The fourth proportional to 1,708.76, 2,563.52 and 613.92 is: 921.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.76 : 2,563.52 = 613.92 : x
  2. Step 2: Convert to fraction form
    1,708.76/2,563.52 = 613.92/x
  3. Step 3: Cross multiply
    1,708.76x = 2,563.52 × 613.92
  4. Step 4: Simplify right side
    1,708.76x = 1,573,796.20
  5. Step 5: Solve for x
    x = 1,573,796.20/1,708.76
  6. Step 6: Final answer
    x = 921.02

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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.