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Finding the Fourth Proportional to 836.72, 1,153.40 and 626.58

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Solution

The fourth proportional to 836.72, 1,153.40 and 626.58 is: 863.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.72 : 1,153.40 = 626.58 : x
  2. Step 2: Convert to fraction form
    836.72/1,153.40 = 626.58/x
  3. Step 3: Cross multiply
    836.72x = 1,153.40 × 626.58
  4. Step 4: Simplify right side
    836.72x = 722,694.24
  5. Step 5: Solve for x
    x = 722,694.24/836.72
  6. Step 6: Final answer
    x = 863.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.