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Finding the Fourth Proportional to 575.27, 861.08 and 453.77

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Solution

The fourth proportional to 575.27, 861.08 and 453.77 is: 679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.27 : 861.08 = 453.77 : x
  2. Step 2: Convert to fraction form
    575.27/861.08 = 453.77/x
  3. Step 3: Cross multiply
    575.27x = 861.08 × 453.77
  4. Step 4: Simplify right side
    575.27x = 390,725.70
  5. Step 5: Solve for x
    x = 390,725.70/575.27
  6. Step 6: Final answer
    x = 679.21

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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.