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Finding the Fourth Proportional to 695.48, 1,043.10 and 579.10

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Solution

The fourth proportional to 695.48, 1,043.10 and 579.10 is: 868.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.48 : 1,043.10 = 579.10 : x
  2. Step 2: Convert to fraction form
    695.48/1,043.10 = 579.10/x
  3. Step 3: Cross multiply
    695.48x = 1,043.10 × 579.10
  4. Step 4: Simplify right side
    695.48x = 604,056.60
  5. Step 5: Solve for x
    x = 604,056.60/695.48
  6. Step 6: Final answer
    x = 868.55

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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.