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Finding the Fourth Proportional to 467.17, 644.71 and 280.77

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Solution

The fourth proportional to 467.17, 644.71 and 280.77 is: 387.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.17 : 644.71 = 280.77 : x
  2. Step 2: Convert to fraction form
    467.17/644.71 = 280.77/x
  3. Step 3: Cross multiply
    467.17x = 644.71 × 280.77
  4. Step 4: Simplify right side
    467.17x = 181,012.63
  5. Step 5: Solve for x
    x = 181,012.63/467.17
  6. Step 6: Final answer
    x = 387.47

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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.