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Finding the Fourth Proportional to 937.29, 1,405.30 and 659.87

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Solution

The fourth proportional to 937.29, 1,405.30 and 659.87 is: 989.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.29 : 1,405.30 = 659.87 : x
  2. Step 2: Convert to fraction form
    937.29/1,405.30 = 659.87/x
  3. Step 3: Cross multiply
    937.29x = 1,405.30 × 659.87
  4. Step 4: Simplify right side
    937.29x = 927,315.31
  5. Step 5: Solve for x
    x = 927,315.31/937.29
  6. Step 6: Final answer
    x = 989.36

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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.