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Finding the Fourth Proportional to 2,187.71, 3,281.58 and 726.87

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Solution

The fourth proportional to 2,187.71, 3,281.58 and 726.87 is: 1,090.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.71 : 3,281.58 = 726.87 : x
  2. Step 2: Convert to fraction form
    2,187.71/3,281.58 = 726.87/x
  3. Step 3: Cross multiply
    2,187.71x = 3,281.58 × 726.87
  4. Step 4: Simplify right side
    2,187.71x = 2,385,294.36
  5. Step 5: Solve for x
    x = 2,385,294.36/2,187.71
  6. Step 6: Final answer
    x = 1,090.32

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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.