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Finding the Fourth Proportional to 262.53, 392.85 and 211.23

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Solution

The fourth proportional to 262.53, 392.85 and 211.23 is: 316.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.53 : 392.85 = 211.23 : x
  2. Step 2: Convert to fraction form
    262.53/392.85 = 211.23/x
  3. Step 3: Cross multiply
    262.53x = 392.85 × 211.23
  4. Step 4: Simplify right side
    262.53x = 82,981.71
  5. Step 5: Solve for x
    x = 82,981.71/262.53
  6. Step 6: Final answer
    x = 316.08

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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.