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Finding the Fourth Proportional to 342.65, 472.88 and 202.74

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Solution

The fourth proportional to 342.65, 472.88 and 202.74 is: 279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.65 : 472.88 = 202.74 : x
  2. Step 2: Convert to fraction form
    342.65/472.88 = 202.74/x
  3. Step 3: Cross multiply
    342.65x = 472.88 × 202.74
  4. Step 4: Simplify right side
    342.65x = 95,870.68
  5. Step 5: Solve for x
    x = 95,870.68/342.65
  6. Step 6: Final answer
    x = 279.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.