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Finding the Fourth Proportional to 282.85, 421.70 and 275.74

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Solution

The fourth proportional to 282.85, 421.70 and 275.74 is: 411.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.85 : 421.70 = 275.74 : x
  2. Step 2: Convert to fraction form
    282.85/421.70 = 275.74/x
  3. Step 3: Cross multiply
    282.85x = 421.70 × 275.74
  4. Step 4: Simplify right side
    282.85x = 116,279.56
  5. Step 5: Solve for x
    x = 116,279.56/282.85
  6. Step 6: Final answer
    x = 411.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.