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Finding the Fourth Proportional to 868.71, 1,301.35 and 559.50

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Solution

The fourth proportional to 868.71, 1,301.35 and 559.50 is: 838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.71 : 1,301.35 = 559.50 : x
  2. Step 2: Convert to fraction form
    868.71/1,301.35 = 559.50/x
  3. Step 3: Cross multiply
    868.71x = 1,301.35 × 559.50
  4. Step 4: Simplify right side
    868.71x = 728,105.33
  5. Step 5: Solve for x
    x = 728,105.33/868.71
  6. Step 6: Final answer
    x = 838.15

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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.