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Finding the Fourth Proportional to 1,010.61, 1,516.19 and 425.31

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Solution

The fourth proportional to 1,010.61, 1,516.19 and 425.31 is: 638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.61 : 1,516.19 = 425.31 : x
  2. Step 2: Convert to fraction form
    1,010.61/1,516.19 = 425.31/x
  3. Step 3: Cross multiply
    1,010.61x = 1,516.19 × 425.31
  4. Step 4: Simplify right side
    1,010.61x = 644,846.15
  5. Step 5: Solve for x
    x = 644,846.15/1,010.61
  6. Step 6: Final answer
    x = 638.08

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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.