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Finding the Fourth Proportional to 1,023.31, 1,534.97 and 253.81

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Solution

The fourth proportional to 1,023.31, 1,534.97 and 253.81 is: 380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.31 : 1,534.97 = 253.81 : x
  2. Step 2: Convert to fraction form
    1,023.31/1,534.97 = 253.81/x
  3. Step 3: Cross multiply
    1,023.31x = 1,534.97 × 253.81
  4. Step 4: Simplify right side
    1,023.31x = 389,590.74
  5. Step 5: Solve for x
    x = 389,590.74/1,023.31
  6. Step 6: Final answer
    x = 380.72

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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.