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Finding the Fourth Proportional to 868.69, 1,301.91 and 662.50

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Solution

The fourth proportional to 868.69, 1,301.91 and 662.50 is: 992.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.69 : 1,301.91 = 662.50 : x
  2. Step 2: Convert to fraction form
    868.69/1,301.91 = 662.50/x
  3. Step 3: Cross multiply
    868.69x = 1,301.91 × 662.50
  4. Step 4: Simplify right side
    868.69x = 862,512.06
  5. Step 5: Solve for x
    x = 862,512.06/868.69
  6. Step 6: Final answer
    x = 992.89

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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.