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Finding the Fourth Proportional to 1,123.62, 1,684.30 and 538.46

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Solution

The fourth proportional to 1,123.62, 1,684.30 and 538.46 is: 807.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.62 : 1,684.30 = 538.46 : x
  2. Step 2: Convert to fraction form
    1,123.62/1,684.30 = 538.46/x
  3. Step 3: Cross multiply
    1,123.62x = 1,684.30 × 538.46
  4. Step 4: Simplify right side
    1,123.62x = 906,928.18
  5. Step 5: Solve for x
    x = 906,928.18/1,123.62
  6. Step 6: Final answer
    x = 807.15

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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.