Home / 1,123.28-1,685.10-474.05

Finding the Fourth Proportional to 1,123.28, 1,685.10 and 474.05

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Solution

The fourth proportional to 1,123.28, 1,685.10 and 474.05 is: 711.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.28 : 1,685.10 = 474.05 : x
  2. Step 2: Convert to fraction form
    1,123.28/1,685.10 = 474.05/x
  3. Step 3: Cross multiply
    1,123.28x = 1,685.10 × 474.05
  4. Step 4: Simplify right side
    1,123.28x = 798,821.66
  5. Step 5: Solve for x
    x = 798,821.66/1,123.28
  6. Step 6: Final answer
    x = 711.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.