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Finding the Fourth Proportional to 212.48, 292.76 and 212.07

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Solution

The fourth proportional to 212.48, 292.76 and 212.07 is: 292.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.48 : 292.76 = 212.07 : x
  2. Step 2: Convert to fraction form
    212.48/292.76 = 212.07/x
  3. Step 3: Cross multiply
    212.48x = 292.76 × 212.07
  4. Step 4: Simplify right side
    212.48x = 62,084.55
  5. Step 5: Solve for x
    x = 62,084.55/212.48
  6. Step 6: Final answer
    x = 292.20

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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.