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Finding the Fourth Proportional to 846.75, 1,169.00 and 639.39

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Solution

The fourth proportional to 846.75, 1,169.00 and 639.39 is: 882.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.75 : 1,169.00 = 639.39 : x
  2. Step 2: Convert to fraction form
    846.75/1,169.00 = 639.39/x
  3. Step 3: Cross multiply
    846.75x = 1,169.00 × 639.39
  4. Step 4: Simplify right side
    846.75x = 747,443.71
  5. Step 5: Solve for x
    x = 747,443.71/846.75
  6. Step 6: Final answer
    x = 882.72

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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.