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Finding the Fourth Proportional to 294.94, 442.21 and 140.64

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Solution

The fourth proportional to 294.94, 442.21 and 140.64 is: 210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.94 : 442.21 = 140.64 : x
  2. Step 2: Convert to fraction form
    294.94/442.21 = 140.64/x
  3. Step 3: Cross multiply
    294.94x = 442.21 × 140.64
  4. Step 4: Simplify right side
    294.94x = 62,190.67
  5. Step 5: Solve for x
    x = 62,190.67/294.94
  6. Step 6: Final answer
    x = 210.86

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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.