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Finding the Fourth Proportional to 846.50, 1,168.65 and 639.14

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Solution

The fourth proportional to 846.50, 1,168.65 and 639.14 is: 882.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.50 : 1,168.65 = 639.14 : x
  2. Step 2: Convert to fraction form
    846.50/1,168.65 = 639.14/x
  3. Step 3: Cross multiply
    846.50x = 1,168.65 × 639.14
  4. Step 4: Simplify right side
    846.50x = 746,930.96
  5. Step 5: Solve for x
    x = 746,930.96/846.50
  6. Step 6: Final answer
    x = 882.38

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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.