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Finding the Fourth Proportional to 864.09, 1,294.83 and 574.92

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Solution

The fourth proportional to 864.09, 1,294.83 and 574.92 is: 861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.09 : 1,294.83 = 574.92 : x
  2. Step 2: Convert to fraction form
    864.09/1,294.83 = 574.92/x
  3. Step 3: Cross multiply
    864.09x = 1,294.83 × 574.92
  4. Step 4: Simplify right side
    864.09x = 744,423.66
  5. Step 5: Solve for x
    x = 744,423.66/864.09
  6. Step 6: Final answer
    x = 861.51

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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.