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Finding the Fourth Proportional to 949.01, 1,301.28 and 855.38

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Solution

The fourth proportional to 949.01, 1,301.28 and 855.38 is: 1,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.01 : 1,301.28 = 855.38 : x
  2. Step 2: Convert to fraction form
    949.01/1,301.28 = 855.38/x
  3. Step 3: Cross multiply
    949.01x = 1,301.28 × 855.38
  4. Step 4: Simplify right side
    949.01x = 1,113,084.61
  5. Step 5: Solve for x
    x = 1,113,084.61/949.01
  6. Step 6: Final answer
    x = 1,172.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.