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Finding the Fourth Proportional to 1,388.04, 2,079.03 and 1,077.48

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Solution

The fourth proportional to 1,388.04, 2,079.03 and 1,077.48 is: 1,613.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.04 : 2,079.03 = 1,077.48 : x
  2. Step 2: Convert to fraction form
    1,388.04/2,079.03 = 1,077.48/x
  3. Step 3: Cross multiply
    1,388.04x = 2,079.03 × 1,077.48
  4. Step 4: Simplify right side
    1,388.04x = 2,240,113.24
  5. Step 5: Solve for x
    x = 2,240,113.24/1,388.04
  6. Step 6: Final answer
    x = 1,613.87

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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.