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Finding the Fourth Proportional to 1,352.91, 1,867.07 and 763.50

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Solution

The fourth proportional to 1,352.91, 1,867.07 and 763.50 is: 1,053.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.91 : 1,867.07 = 763.50 : x
  2. Step 2: Convert to fraction form
    1,352.91/1,867.07 = 763.50/x
  3. Step 3: Cross multiply
    1,352.91x = 1,867.07 × 763.50
  4. Step 4: Simplify right side
    1,352.91x = 1,425,507.95
  5. Step 5: Solve for x
    x = 1,425,507.95/1,352.91
  6. Step 6: Final answer
    x = 1,053.66

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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.