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Finding the Fourth Proportional to 1,120.44, 1,545.21 and 677.58

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Solution

The fourth proportional to 1,120.44, 1,545.21 and 677.58 is: 934.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.44 : 1,545.21 = 677.58 : x
  2. Step 2: Convert to fraction form
    1,120.44/1,545.21 = 677.58/x
  3. Step 3: Cross multiply
    1,120.44x = 1,545.21 × 677.58
  4. Step 4: Simplify right side
    1,120.44x = 1,046,997.60
  5. Step 5: Solve for x
    x = 1,046,997.60/1,120.44
  6. Step 6: Final answer
    x = 934.45

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1.5x scale

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.