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Finding the Fourth Proportional to 868, 1,298.76 and 541.84

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Solution

The fourth proportional to 868, 1,298.76 and 541.84 is: 810.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    868 : 1,298.76 = 541.84 : x
  2. Step 2: Convert to fraction form
    868/1,298.76 = 541.84/x
  3. Step 3: Cross multiply
    868x = 1,298.76 × 541.84
  4. Step 4: Simplify right side
    868x = 703,720.12
  5. Step 5: Solve for x
    x = 703,720.12/868
  6. Step 6: Final answer
    x = 810.74

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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.