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Finding the Fourth Proportional to 1,017.52, 1,526.90 and 440.39

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Solution

The fourth proportional to 1,017.52, 1,526.90 and 440.39 is: 660.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.52 : 1,526.90 = 440.39 : x
  2. Step 2: Convert to fraction form
    1,017.52/1,526.90 = 440.39/x
  3. Step 3: Cross multiply
    1,017.52x = 1,526.90 × 440.39
  4. Step 4: Simplify right side
    1,017.52x = 672,433.11
  5. Step 5: Solve for x
    x = 672,433.11/1,017.52
  6. Step 6: Final answer
    x = 660.86

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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.