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Finding the Fourth Proportional to 1,520.16, 2,279.76 and 546

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Solution

The fourth proportional to 1,520.16, 2,279.76 and 546 is: 818.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.16 : 2,279.76 = 546 : x
  2. Step 2: Convert to fraction form
    1,520.16/2,279.76 = 546/x
  3. Step 3: Cross multiply
    1,520.16x = 2,279.76 × 546
  4. Step 4: Simplify right side
    1,520.16x = 1,244,748.96
  5. Step 5: Solve for x
    x = 1,244,748.96/1,520.16
  6. Step 6: Final answer
    x = 818.83

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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.