Home / 1,123.30-1,550.12-625.92

Finding the Fourth Proportional to 1,123.30, 1,550.12 and 625.92

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Solution

The fourth proportional to 1,123.30, 1,550.12 and 625.92 is: 863.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.30 : 1,550.12 = 625.92 : x
  2. Step 2: Convert to fraction form
    1,123.30/1,550.12 = 625.92/x
  3. Step 3: Cross multiply
    1,123.30x = 1,550.12 × 625.92
  4. Step 4: Simplify right side
    1,123.30x = 970,251.11
  5. Step 5: Solve for x
    x = 970,251.11/1,123.30
  6. Step 6: Final answer
    x = 863.75

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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.