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Finding the Fourth Proportional to 934.31, 1,399.92 and 659.06

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Solution

The fourth proportional to 934.31, 1,399.92 and 659.06 is: 987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.31 : 1,399.92 = 659.06 : x
  2. Step 2: Convert to fraction form
    934.31/1,399.92 = 659.06/x
  3. Step 3: Cross multiply
    934.31x = 1,399.92 × 659.06
  4. Step 4: Simplify right side
    934.31x = 922,631.28
  5. Step 5: Solve for x
    x = 922,631.28/934.31
  6. Step 6: Final answer
    x = 987.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.