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Finding the Fourth Proportional to 837.95, 1,154.86 and 641.72

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Solution

The fourth proportional to 837.95, 1,154.86 and 641.72 is: 884.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.95 : 1,154.86 = 641.72 : x
  2. Step 2: Convert to fraction form
    837.95/1,154.86 = 641.72/x
  3. Step 3: Cross multiply
    837.95x = 1,154.86 × 641.72
  4. Step 4: Simplify right side
    837.95x = 741,098.04
  5. Step 5: Solve for x
    x = 741,098.04/837.95
  6. Step 6: Final answer
    x = 884.42

Related Problems

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Half scale
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Double scale
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1.5x scale

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.