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Finding the Fourth Proportional to 836.40, 1,254.74 and 288.46

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Solution

The fourth proportional to 836.40, 1,254.74 and 288.46 is: 432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.40 : 1,254.74 = 288.46 : x
  2. Step 2: Convert to fraction form
    836.40/1,254.74 = 288.46/x
  3. Step 3: Cross multiply
    836.40x = 1,254.74 × 288.46
  4. Step 4: Simplify right side
    836.40x = 361,942.30
  5. Step 5: Solve for x
    x = 361,942.30/836.40
  6. Step 6: Final answer
    x = 432.74

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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.