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Finding the Fourth Proportional to 1,158.66, 1,739.16 and 574.08

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Solution

The fourth proportional to 1,158.66, 1,739.16 and 574.08 is: 861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.66 : 1,739.16 = 574.08 : x
  2. Step 2: Convert to fraction form
    1,158.66/1,739.16 = 574.08/x
  3. Step 3: Cross multiply
    1,158.66x = 1,739.16 × 574.08
  4. Step 4: Simplify right side
    1,158.66x = 998,416.97
  5. Step 5: Solve for x
    x = 998,416.97/1,158.66
  6. Step 6: Final answer
    x = 861.70

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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.