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Finding the Fourth Proportional to 1,359.81, 2,040.63 and 873.20

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Solution

The fourth proportional to 1,359.81, 2,040.63 and 873.20 is: 1,310.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.81 : 2,040.63 = 873.20 : x
  2. Step 2: Convert to fraction form
    1,359.81/2,040.63 = 873.20/x
  3. Step 3: Cross multiply
    1,359.81x = 2,040.63 × 873.20
  4. Step 4: Simplify right side
    1,359.81x = 1,781,878.85
  5. Step 5: Solve for x
    x = 1,781,878.85/1,359.81
  6. Step 6: Final answer
    x = 1,310.39

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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.