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Finding the Fourth Proportional to 1,010.75, 1,516.59 and 425.87

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Solution

The fourth proportional to 1,010.75, 1,516.59 and 425.87 is: 639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.75 : 1,516.59 = 425.87 : x
  2. Step 2: Convert to fraction form
    1,010.75/1,516.59 = 425.87/x
  3. Step 3: Cross multiply
    1,010.75x = 1,516.59 × 425.87
  4. Step 4: Simplify right side
    1,010.75x = 645,873.97
  5. Step 5: Solve for x
    x = 645,873.97/1,010.75
  6. Step 6: Final answer
    x = 639.01

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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.