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Finding the Fourth Proportional to 868.11, 1,302.38 and 291.03

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Solution

The fourth proportional to 868.11, 1,302.38 and 291.03 is: 436.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.11 : 1,302.38 = 291.03 : x
  2. Step 2: Convert to fraction form
    868.11/1,302.38 = 291.03/x
  3. Step 3: Cross multiply
    868.11x = 1,302.38 × 291.03
  4. Step 4: Simplify right side
    868.11x = 379,030.20
  5. Step 5: Solve for x
    x = 379,030.20/868.11
  6. Step 6: Final answer
    x = 436.62

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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.