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Finding the Fourth Proportional to 407.92, 563.39 and 276.70

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Solution

The fourth proportional to 407.92, 563.39 and 276.70 is: 382.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.92 : 563.39 = 276.70 : x
  2. Step 2: Convert to fraction form
    407.92/563.39 = 276.70/x
  3. Step 3: Cross multiply
    407.92x = 563.39 × 276.70
  4. Step 4: Simplify right side
    407.92x = 155,890.01
  5. Step 5: Solve for x
    x = 155,890.01/407.92
  6. Step 6: Final answer
    x = 382.16

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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.