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Finding the Fourth Proportional to 274.65, 411.43 and 210.39

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Solution

The fourth proportional to 274.65, 411.43 and 210.39 is: 315.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.65 : 411.43 = 210.39 : x
  2. Step 2: Convert to fraction form
    274.65/411.43 = 210.39/x
  3. Step 3: Cross multiply
    274.65x = 411.43 × 210.39
  4. Step 4: Simplify right side
    274.65x = 86,560.76
  5. Step 5: Solve for x
    x = 86,560.76/274.65
  6. Step 6: Final answer
    x = 315.17

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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.