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Finding the Fourth Proportional to 1,123.46, 1,685.21 and 301.73

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Solution

The fourth proportional to 1,123.46, 1,685.21 and 301.73 is: 452.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.46 : 1,685.21 = 301.73 : x
  2. Step 2: Convert to fraction form
    1,123.46/1,685.21 = 301.73/x
  3. Step 3: Cross multiply
    1,123.46x = 1,685.21 × 301.73
  4. Step 4: Simplify right side
    1,123.46x = 508,478.41
  5. Step 5: Solve for x
    x = 508,478.41/1,123.46
  6. Step 6: Final answer
    x = 452.60

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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.