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Finding the Fourth Proportional to 1,101.02, 1,519.57 and 702.85

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Solution

The fourth proportional to 1,101.02, 1,519.57 and 702.85 is: 970.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.02 : 1,519.57 = 702.85 : x
  2. Step 2: Convert to fraction form
    1,101.02/1,519.57 = 702.85/x
  3. Step 3: Cross multiply
    1,101.02x = 1,519.57 × 702.85
  4. Step 4: Simplify right side
    1,101.02x = 1,068,024.22
  5. Step 5: Solve for x
    x = 1,068,024.22/1,101.02
  6. Step 6: Final answer
    x = 970.04

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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.