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Finding the Fourth Proportional to 1,840.79, 2,761.19 and 543.17

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Solution

The fourth proportional to 1,840.79, 2,761.19 and 543.17 is: 814.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.79 : 2,761.19 = 543.17 : x
  2. Step 2: Convert to fraction form
    1,840.79/2,761.19 = 543.17/x
  3. Step 3: Cross multiply
    1,840.79x = 2,761.19 × 543.17
  4. Step 4: Simplify right side
    1,840.79x = 1,499,795.57
  5. Step 5: Solve for x
    x = 1,499,795.57/1,840.79
  6. Step 6: Final answer
    x = 814.76

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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.