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Finding the Fourth Proportional to 1,070.92, 1,487.11 and 1,062.28

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Solution

The fourth proportional to 1,070.92, 1,487.11 and 1,062.28 is: 1,475.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.92 : 1,487.11 = 1,062.28 : x
  2. Step 2: Convert to fraction form
    1,070.92/1,487.11 = 1,062.28/x
  3. Step 3: Cross multiply
    1,070.92x = 1,487.11 × 1,062.28
  4. Step 4: Simplify right side
    1,070.92x = 1,579,727.21
  5. Step 5: Solve for x
    x = 1,579,727.21/1,070.92
  6. Step 6: Final answer
    x = 1,475.11

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.