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Finding the Fourth Proportional to 1,325.10, 1,986.61 and 837.13

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Solution

The fourth proportional to 1,325.10, 1,986.61 and 837.13 is: 1,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.10 : 1,986.61 = 837.13 : x
  2. Step 2: Convert to fraction form
    1,325.10/1,986.61 = 837.13/x
  3. Step 3: Cross multiply
    1,325.10x = 1,986.61 × 837.13
  4. Step 4: Simplify right side
    1,325.10x = 1,663,040.90
  5. Step 5: Solve for x
    x = 1,663,040.90/1,325.10
  6. Step 6: Final answer
    x = 1,255.03

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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.