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Finding the Fourth Proportional to 1,119.98, 1,545.21 and 677.85

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Solution

The fourth proportional to 1,119.98, 1,545.21 and 677.85 is: 935.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.98 : 1,545.21 = 677.85 : x
  2. Step 2: Convert to fraction form
    1,119.98/1,545.21 = 677.85/x
  3. Step 3: Cross multiply
    1,119.98x = 1,545.21 × 677.85
  4. Step 4: Simplify right side
    1,119.98x = 1,047,420.60
  5. Step 5: Solve for x
    x = 1,047,420.60/1,119.98
  6. Step 6: Final answer
    x = 935.22

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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.