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Finding the Fourth Proportional to 974.02, 1,351.04 and 939.00

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Solution

The fourth proportional to 974.02, 1,351.04 and 939.00 is: 1,302.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.02 : 1,351.04 = 939.00 : x
  2. Step 2: Convert to fraction form
    974.02/1,351.04 = 939.00/x
  3. Step 3: Cross multiply
    974.02x = 1,351.04 × 939.00
  4. Step 4: Simplify right side
    974.02x = 1,268,615.11
  5. Step 5: Solve for x
    x = 1,268,615.11/974.02
  6. Step 6: Final answer
    x = 1,302.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.