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Finding the Fourth Proportional to 467.12, 644.84 and 342.78

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Solution

The fourth proportional to 467.12, 644.84 and 342.78 is: 473.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.12 : 644.84 = 342.78 : x
  2. Step 2: Convert to fraction form
    467.12/644.84 = 342.78/x
  3. Step 3: Cross multiply
    467.12x = 644.84 × 342.78
  4. Step 4: Simplify right side
    467.12x = 221,038.26
  5. Step 5: Solve for x
    x = 221,038.26/467.12
  6. Step 6: Final answer
    x = 473.19

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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.