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Finding the Fourth Proportional to 836.94, 1,253.78 and 547.50

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Solution

The fourth proportional to 836.94, 1,253.78 and 547.50 is: 820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.94 : 1,253.78 = 547.50 : x
  2. Step 2: Convert to fraction form
    836.94/1,253.78 = 547.50/x
  3. Step 3: Cross multiply
    836.94x = 1,253.78 × 547.50
  4. Step 4: Simplify right side
    836.94x = 686,441.81
  5. Step 5: Solve for x
    x = 686,441.81/836.94
  6. Step 6: Final answer
    x = 820.18

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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.