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Finding the Fourth Proportional to 713.62, 1,071.04 and 281.08

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Solution

The fourth proportional to 713.62, 1,071.04 and 281.08 is: 421.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.62 : 1,071.04 = 281.08 : x
  2. Step 2: Convert to fraction form
    713.62/1,071.04 = 281.08/x
  3. Step 3: Cross multiply
    713.62x = 1,071.04 × 281.08
  4. Step 4: Simplify right side
    713.62x = 301,047.92
  5. Step 5: Solve for x
    x = 301,047.92/713.62
  6. Step 6: Final answer
    x = 421.86

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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.