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Finding the Fourth Proportional to 1,119.64, 1,545.15 and 677.65

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Solution

The fourth proportional to 1,119.64, 1,545.15 and 677.65 is: 935.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.64 : 1,545.15 = 677.65 : x
  2. Step 2: Convert to fraction form
    1,119.64/1,545.15 = 677.65/x
  3. Step 3: Cross multiply
    1,119.64x = 1,545.15 × 677.65
  4. Step 4: Simplify right side
    1,119.64x = 1,047,070.90
  5. Step 5: Solve for x
    x = 1,047,070.90/1,119.64
  6. Step 6: Final answer
    x = 935.19

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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.