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Finding the Fourth Proportional to 294.84, 442.28 and 140.74

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Solution

The fourth proportional to 294.84, 442.28 and 140.74 is: 211.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.84 : 442.28 = 140.74 : x
  2. Step 2: Convert to fraction form
    294.84/442.28 = 140.74/x
  3. Step 3: Cross multiply
    294.84x = 442.28 × 140.74
  4. Step 4: Simplify right side
    294.84x = 62,246.49
  5. Step 5: Solve for x
    x = 62,246.49/294.84
  6. Step 6: Final answer
    x = 211.12

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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.