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Finding the Fourth Proportional to 1,386.29, 2,079.44 and 360.29

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Solution

The fourth proportional to 1,386.29, 2,079.44 and 360.29 is: 540.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.29 : 2,079.44 = 360.29 : x
  2. Step 2: Convert to fraction form
    1,386.29/2,079.44 = 360.29/x
  3. Step 3: Cross multiply
    1,386.29x = 2,079.44 × 360.29
  4. Step 4: Simplify right side
    1,386.29x = 749,191.94
  5. Step 5: Solve for x
    x = 749,191.94/1,386.29
  6. Step 6: Final answer
    x = 540.43

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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.