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Finding the Fourth Proportional to 696.04, 1,042.38 and 579.76

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Solution

The fourth proportional to 696.04, 1,042.38 and 579.76 is: 868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.04 : 1,042.38 = 579.76 : x
  2. Step 2: Convert to fraction form
    696.04/1,042.38 = 579.76/x
  3. Step 3: Cross multiply
    696.04x = 1,042.38 × 579.76
  4. Step 4: Simplify right side
    696.04x = 604,330.23
  5. Step 5: Solve for x
    x = 604,330.23/696.04
  6. Step 6: Final answer
    x = 868.24

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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.