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Finding the Fourth Proportional to 836.42, 1,253.79 and 288.50

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Solution

The fourth proportional to 836.42, 1,253.79 and 288.50 is: 432.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.42 : 1,253.79 = 288.50 : x
  2. Step 2: Convert to fraction form
    836.42/1,253.79 = 288.50/x
  3. Step 3: Cross multiply
    836.42x = 1,253.79 × 288.50
  4. Step 4: Simplify right side
    836.42x = 361,718.42
  5. Step 5: Solve for x
    x = 361,718.42/836.42
  6. Step 6: Final answer
    x = 432.46

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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.