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Finding the Fourth Proportional to 1,639.92, 2,457.84 and 702.48

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Solution

The fourth proportional to 1,639.92, 2,457.84 and 702.48 is: 1,052.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.92 : 2,457.84 = 702.48 : x
  2. Step 2: Convert to fraction form
    1,639.92/2,457.84 = 702.48/x
  3. Step 3: Cross multiply
    1,639.92x = 2,457.84 × 702.48
  4. Step 4: Simplify right side
    1,639.92x = 1,726,583.44
  5. Step 5: Solve for x
    x = 1,726,583.44/1,639.92
  6. Step 6: Final answer
    x = 1,052.85

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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.