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Finding the Fourth Proportional to 434.98, 652.05 and 191.21

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Solution

The fourth proportional to 434.98, 652.05 and 191.21 is: 286.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.98 : 652.05 = 191.21 : x
  2. Step 2: Convert to fraction form
    434.98/652.05 = 191.21/x
  3. Step 3: Cross multiply
    434.98x = 652.05 × 191.21
  4. Step 4: Simplify right side
    434.98x = 124,675.22
  5. Step 5: Solve for x
    x = 124,675.22/434.98
  6. Step 6: Final answer
    x = 286.62

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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.