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Finding the Fourth Proportional to 1,123.95, 1,684.91 and 575.85

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Solution

The fourth proportional to 1,123.95, 1,684.91 and 575.85 is: 863.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.95 : 1,684.91 = 575.85 : x
  2. Step 2: Convert to fraction form
    1,123.95/1,684.91 = 575.85/x
  3. Step 3: Cross multiply
    1,123.95x = 1,684.91 × 575.85
  4. Step 4: Simplify right side
    1,123.95x = 970,256.86
  5. Step 5: Solve for x
    x = 970,256.86/1,123.95
  6. Step 6: Final answer
    x = 863.26

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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.