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Finding the Fourth Proportional to 837.17, 1,257.74 and 790.55

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Solution

The fourth proportional to 837.17, 1,257.74 and 790.55 is: 1,187.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.17 : 1,257.74 = 790.55 : x
  2. Step 2: Convert to fraction form
    837.17/1,257.74 = 790.55/x
  3. Step 3: Cross multiply
    837.17x = 1,257.74 × 790.55
  4. Step 4: Simplify right side
    837.17x = 994,300.83
  5. Step 5: Solve for x
    x = 994,300.83/837.17
  6. Step 6: Final answer
    x = 1,187.69

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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.