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Finding the Fourth Proportional to 713.71, 1,070.42 and 251.48

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Solution

The fourth proportional to 713.71, 1,070.42 and 251.48 is: 377.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.71 : 1,070.42 = 251.48 : x
  2. Step 2: Convert to fraction form
    713.71/1,070.42 = 251.48/x
  3. Step 3: Cross multiply
    713.71x = 1,070.42 × 251.48
  4. Step 4: Simplify right side
    713.71x = 269,189.75
  5. Step 5: Solve for x
    x = 269,189.75/713.71
  6. Step 6: Final answer
    x = 377.17

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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.