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Finding the Fourth Proportional to 972.50, 1,454.31 and 725.87

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Solution

The fourth proportional to 972.50, 1,454.31 and 725.87 is: 1,085.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.50 : 1,454.31 = 725.87 : x
  2. Step 2: Convert to fraction form
    972.50/1,454.31 = 725.87/x
  3. Step 3: Cross multiply
    972.50x = 1,454.31 × 725.87
  4. Step 4: Simplify right side
    972.50x = 1,055,636.37
  5. Step 5: Solve for x
    x = 1,055,636.37/972.50
  6. Step 6: Final answer
    x = 1,085.49

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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.