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Finding the Fourth Proportional to 2,387.26, 3,579.47 and 981.26

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Solution

The fourth proportional to 2,387.26, 3,579.47 and 981.26 is: 1,471.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.26 : 3,579.47 = 981.26 : x
  2. Step 2: Convert to fraction form
    2,387.26/3,579.47 = 981.26/x
  3. Step 3: Cross multiply
    2,387.26x = 3,579.47 × 981.26
  4. Step 4: Simplify right side
    2,387.26x = 3,512,390.73
  5. Step 5: Solve for x
    x = 3,512,390.73/2,387.26
  6. Step 6: Final answer
    x = 1,471.31

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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.