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Finding the Fourth Proportional to 1,352.32, 1,866.26 and 762.86

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Solution

The fourth proportional to 1,352.32, 1,866.26 and 762.86 is: 1,052.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.32 : 1,866.26 = 762.86 : x
  2. Step 2: Convert to fraction form
    1,352.32/1,866.26 = 762.86/x
  3. Step 3: Cross multiply
    1,352.32x = 1,866.26 × 762.86
  4. Step 4: Simplify right side
    1,352.32x = 1,423,695.10
  5. Step 5: Solve for x
    x = 1,423,695.10/1,352.32
  6. Step 6: Final answer
    x = 1,052.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.