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Finding the Fourth Proportional to 695.70, 1,042.92 and 370.76

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Solution

The fourth proportional to 695.70, 1,042.92 and 370.76 is: 555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.70 : 1,042.92 = 370.76 : x
  2. Step 2: Convert to fraction form
    695.70/1,042.92 = 370.76/x
  3. Step 3: Cross multiply
    695.70x = 1,042.92 × 370.76
  4. Step 4: Simplify right side
    695.70x = 386,667.80
  5. Step 5: Solve for x
    x = 386,667.80/695.70
  6. Step 6: Final answer
    x = 555.80

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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.