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Finding the Fourth Proportional to 836.18, 1,253.58 and 488.66

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Solution

The fourth proportional to 836.18, 1,253.58 and 488.66 is: 732.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.18 : 1,253.58 = 488.66 : x
  2. Step 2: Convert to fraction form
    836.18/1,253.58 = 488.66/x
  3. Step 3: Cross multiply
    836.18x = 1,253.58 × 488.66
  4. Step 4: Simplify right side
    836.18x = 612,574.40
  5. Step 5: Solve for x
    x = 612,574.40/836.18
  6. Step 6: Final answer
    x = 732.59

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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.