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Finding the Fourth Proportional to 834.95, 1,254.47 and 543.03

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Solution

The fourth proportional to 834.95, 1,254.47 and 543.03 is: 815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.95 : 1,254.47 = 543.03 : x
  2. Step 2: Convert to fraction form
    834.95/1,254.47 = 543.03/x
  3. Step 3: Cross multiply
    834.95x = 1,254.47 × 543.03
  4. Step 4: Simplify right side
    834.95x = 681,212.13
  5. Step 5: Solve for x
    x = 681,212.13/834.95
  6. Step 6: Final answer
    x = 815.88

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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.