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Finding the Fourth Proportional to 412.71, 569.74 and 280.62

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Solution

The fourth proportional to 412.71, 569.74 and 280.62 is: 387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.71 : 569.74 = 280.62 : x
  2. Step 2: Convert to fraction form
    412.71/569.74 = 280.62/x
  3. Step 3: Cross multiply
    412.71x = 569.74 × 280.62
  4. Step 4: Simplify right side
    412.71x = 159,880.44
  5. Step 5: Solve for x
    x = 159,880.44/412.71
  6. Step 6: Final answer
    x = 387.39

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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.