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Finding the Fourth Proportional to 1,759.86, 2,639.78 and 527.27

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Solution

The fourth proportional to 1,759.86, 2,639.78 and 527.27 is: 790.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,759.86 : 2,639.78 = 527.27 : x
  2. Step 2: Convert to fraction form
    1,759.86/2,639.78 = 527.27/x
  3. Step 3: Cross multiply
    1,759.86x = 2,639.78 × 527.27
  4. Step 4: Simplify right side
    1,759.86x = 1,391,876.80
  5. Step 5: Solve for x
    x = 1,391,876.80/1,759.86
  6. Step 6: Final answer
    x = 790.90

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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.