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Finding the Fourth Proportional to 889.65, 1,331.73 and 714.69

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Solution

The fourth proportional to 889.65, 1,331.73 and 714.69 is: 1,069.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.65 : 1,331.73 = 714.69 : x
  2. Step 2: Convert to fraction form
    889.65/1,331.73 = 714.69/x
  3. Step 3: Cross multiply
    889.65x = 1,331.73 × 714.69
  4. Step 4: Simplify right side
    889.65x = 951,774.11
  5. Step 5: Solve for x
    x = 951,774.11/889.65
  6. Step 6: Final answer
    x = 1,069.83

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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.