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Finding the Fourth Proportional to 725.01, 1,089.93 and 572.76

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Solution

The fourth proportional to 725.01, 1,089.93 and 572.76 is: 861.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.01 : 1,089.93 = 572.76 : x
  2. Step 2: Convert to fraction form
    725.01/1,089.93 = 572.76/x
  3. Step 3: Cross multiply
    725.01x = 1,089.93 × 572.76
  4. Step 4: Simplify right side
    725.01x = 624,268.31
  5. Step 5: Solve for x
    x = 624,268.31/725.01
  6. Step 6: Final answer
    x = 861.05

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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.