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Finding the Fourth Proportional to 846.48, 1,169.28 and 638.22

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Solution

The fourth proportional to 846.48, 1,169.28 and 638.22 is: 881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.48 : 1,169.28 = 638.22 : x
  2. Step 2: Convert to fraction form
    846.48/1,169.28 = 638.22/x
  3. Step 3: Cross multiply
    846.48x = 1,169.28 × 638.22
  4. Step 4: Simplify right side
    846.48x = 746,257.88
  5. Step 5: Solve for x
    x = 746,257.88/846.48
  6. Step 6: Final answer
    x = 881.60

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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.