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Finding the Fourth Proportional to 964.02, 1,444.59 and 939.87

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Solution

The fourth proportional to 964.02, 1,444.59 and 939.87 is: 1,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.02 : 1,444.59 = 939.87 : x
  2. Step 2: Convert to fraction form
    964.02/1,444.59 = 939.87/x
  3. Step 3: Cross multiply
    964.02x = 1,444.59 × 939.87
  4. Step 4: Simplify right side
    964.02x = 1,357,726.80
  5. Step 5: Solve for x
    x = 1,357,726.80/964.02
  6. Step 6: Final answer
    x = 1,408.40

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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.