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Finding the Fourth Proportional to 1,360.30, 2,038.13 and 744.45

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Solution

The fourth proportional to 1,360.30, 2,038.13 and 744.45 is: 1,115.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.30 : 2,038.13 = 744.45 : x
  2. Step 2: Convert to fraction form
    1,360.30/2,038.13 = 744.45/x
  3. Step 3: Cross multiply
    1,360.30x = 2,038.13 × 744.45
  4. Step 4: Simplify right side
    1,360.30x = 1,517,285.88
  5. Step 5: Solve for x
    x = 1,517,285.88/1,360.30
  6. Step 6: Final answer
    x = 1,115.41

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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.