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Finding the Fourth Proportional to 434.80, 652.24 and 191.28

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Solution

The fourth proportional to 434.80, 652.24 and 191.28 is: 286.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.80 : 652.24 = 191.28 : x
  2. Step 2: Convert to fraction form
    434.80/652.24 = 191.28/x
  3. Step 3: Cross multiply
    434.80x = 652.24 × 191.28
  4. Step 4: Simplify right side
    434.80x = 124,760.47
  5. Step 5: Solve for x
    x = 124,760.47/434.80
  6. Step 6: Final answer
    x = 286.94

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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.