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Finding the Fourth Proportional to 713.29, 1,069.72 and 302.42

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Solution

The fourth proportional to 713.29, 1,069.72 and 302.42 is: 453.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.29 : 1,069.72 = 302.42 : x
  2. Step 2: Convert to fraction form
    713.29/1,069.72 = 302.42/x
  3. Step 3: Cross multiply
    713.29x = 1,069.72 × 302.42
  4. Step 4: Simplify right side
    713.29x = 323,497.86
  5. Step 5: Solve for x
    x = 323,497.86/713.29
  6. Step 6: Final answer
    x = 453.53

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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.