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Finding the Fourth Proportional to 952.84, 1,428.30 and 440.20

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Solution

The fourth proportional to 952.84, 1,428.30 and 440.20 is: 659.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.84 : 1,428.30 = 440.20 : x
  2. Step 2: Convert to fraction form
    952.84/1,428.30 = 440.20/x
  3. Step 3: Cross multiply
    952.84x = 1,428.30 × 440.20
  4. Step 4: Simplify right side
    952.84x = 628,737.66
  5. Step 5: Solve for x
    x = 628,737.66/952.84
  6. Step 6: Final answer
    x = 659.86

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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.