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Finding the Fourth Proportional to 1,125.45, 1,553.24 and 677.46

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Solution

The fourth proportional to 1,125.45, 1,553.24 and 677.46 is: 934.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.45 : 1,553.24 = 677.46 : x
  2. Step 2: Convert to fraction form
    1,125.45/1,553.24 = 677.46/x
  3. Step 3: Cross multiply
    1,125.45x = 1,553.24 × 677.46
  4. Step 4: Simplify right side
    1,125.45x = 1,052,254.58
  5. Step 5: Solve for x
    x = 1,052,254.58/1,125.45
  6. Step 6: Final answer
    x = 934.96

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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.