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Finding the Fourth Proportional to 694.32, 1,043.52 and 579.48

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Solution

The fourth proportional to 694.32, 1,043.52 and 579.48 is: 870.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.32 : 1,043.52 = 579.48 : x
  2. Step 2: Convert to fraction form
    694.32/1,043.52 = 579.48/x
  3. Step 3: Cross multiply
    694.32x = 1,043.52 × 579.48
  4. Step 4: Simplify right side
    694.32x = 604,698.97
  5. Step 5: Solve for x
    x = 604,698.97/694.32
  6. Step 6: Final answer
    x = 870.92

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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.