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Finding the Fourth Proportional to 310.16, 427.88 and 211.76

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Solution

The fourth proportional to 310.16, 427.88 and 211.76 is: 292.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.16 : 427.88 = 211.76 : x
  2. Step 2: Convert to fraction form
    310.16/427.88 = 211.76/x
  3. Step 3: Cross multiply
    310.16x = 427.88 × 211.76
  4. Step 4: Simplify right side
    310.16x = 90,607.87
  5. Step 5: Solve for x
    x = 90,607.87/310.16
  6. Step 6: Final answer
    x = 292.13

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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.