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Finding the Fourth Proportional to 959.54, 1,439.88 and 343.19

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Solution

The fourth proportional to 959.54, 1,439.88 and 343.19 is: 514.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.54 : 1,439.88 = 343.19 : x
  2. Step 2: Convert to fraction form
    959.54/1,439.88 = 343.19/x
  3. Step 3: Cross multiply
    959.54x = 1,439.88 × 343.19
  4. Step 4: Simplify right side
    959.54x = 494,152.42
  5. Step 5: Solve for x
    x = 494,152.42/959.54
  6. Step 6: Final answer
    x = 514.99

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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.