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Finding the Fourth Proportional to 713.72, 1,069.08 and 371

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Solution

The fourth proportional to 713.72, 1,069.08 and 371 is: 555.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.72 : 1,069.08 = 371 : x
  2. Step 2: Convert to fraction form
    713.72/1,069.08 = 371/x
  3. Step 3: Cross multiply
    713.72x = 1,069.08 × 371
  4. Step 4: Simplify right side
    713.72x = 396,628.68
  5. Step 5: Solve for x
    x = 396,628.68/713.72
  6. Step 6: Final answer
    x = 555.72

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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.