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Finding the Fourth Proportional to 489.30, 675.45 and 292.89

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Solution

The fourth proportional to 489.30, 675.45 and 292.89 is: 404.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.30 : 675.45 = 292.89 : x
  2. Step 2: Convert to fraction form
    489.30/675.45 = 292.89/x
  3. Step 3: Cross multiply
    489.30x = 675.45 × 292.89
  4. Step 4: Simplify right side
    489.30x = 197,832.55
  5. Step 5: Solve for x
    x = 197,832.55/489.30
  6. Step 6: Final answer
    x = 404.32

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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.