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Finding the Fourth Proportional to 1,100.47, 1,520.13 and 807.30

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Solution

The fourth proportional to 1,100.47, 1,520.13 and 807.30 is: 1,115.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.47 : 1,520.13 = 807.30 : x
  2. Step 2: Convert to fraction form
    1,100.47/1,520.13 = 807.30/x
  3. Step 3: Cross multiply
    1,100.47x = 1,520.13 × 807.30
  4. Step 4: Simplify right side
    1,100.47x = 1,227,200.95
  5. Step 5: Solve for x
    x = 1,227,200.95/1,100.47
  6. Step 6: Final answer
    x = 1,115.16

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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.