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Finding the Fourth Proportional to 489.61, 729.43 and 466.39

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Solution

The fourth proportional to 489.61, 729.43 and 466.39 is: 694.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.61 : 729.43 = 466.39 : x
  2. Step 2: Convert to fraction form
    489.61/729.43 = 466.39/x
  3. Step 3: Cross multiply
    489.61x = 729.43 × 466.39
  4. Step 4: Simplify right side
    489.61x = 340,195.21
  5. Step 5: Solve for x
    x = 340,195.21/489.61
  6. Step 6: Final answer
    x = 694.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.