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Finding the Fourth Proportional to 462.90, 687.18 and 443.46

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Solution

The fourth proportional to 462.90, 687.18 and 443.46 is: 658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.90 : 687.18 = 443.46 : x
  2. Step 2: Convert to fraction form
    462.90/687.18 = 443.46/x
  3. Step 3: Cross multiply
    462.90x = 687.18 × 443.46
  4. Step 4: Simplify right side
    462.90x = 304,736.84
  5. Step 5: Solve for x
    x = 304,736.84/462.90
  6. Step 6: Final answer
    x = 658.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.