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Finding the Fourth Proportional to 853.91, 1,280.01 and 546.11

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Solution

The fourth proportional to 853.91, 1,280.01 and 546.11 is: 818.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.91 : 1,280.01 = 546.11 : x
  2. Step 2: Convert to fraction form
    853.91/1,280.01 = 546.11/x
  3. Step 3: Cross multiply
    853.91x = 1,280.01 × 546.11
  4. Step 4: Simplify right side
    853.91x = 699,026.26
  5. Step 5: Solve for x
    x = 699,026.26/853.91
  6. Step 6: Final answer
    x = 818.62

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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.