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Finding the Fourth Proportional to 2,918.13, 4,377.12 and 726.86

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Solution

The fourth proportional to 2,918.13, 4,377.12 and 726.86 is: 1,090.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.13 : 4,377.12 = 726.86 : x
  2. Step 2: Convert to fraction form
    2,918.13/4,377.12 = 726.86/x
  3. Step 3: Cross multiply
    2,918.13x = 4,377.12 × 726.86
  4. Step 4: Simplify right side
    2,918.13x = 3,181,531.56
  5. Step 5: Solve for x
    x = 3,181,531.56/2,918.13
  6. Step 6: Final answer
    x = 1,090.26

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1.5x scale

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.