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Finding the Fourth Proportional to 716.86, 1,073.80 and 579.16

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Solution

The fourth proportional to 716.86, 1,073.80 and 579.16 is: 867.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.86 : 1,073.80 = 579.16 : x
  2. Step 2: Convert to fraction form
    716.86/1,073.80 = 579.16/x
  3. Step 3: Cross multiply
    716.86x = 1,073.80 × 579.16
  4. Step 4: Simplify right side
    716.86x = 621,902.01
  5. Step 5: Solve for x
    x = 621,902.01/716.86
  6. Step 6: Final answer
    x = 867.54

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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.