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Finding the Fourth Proportional to 489.43, 675.55 and 293.06

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Solution

The fourth proportional to 489.43, 675.55 and 293.06 is: 404.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.43 : 675.55 = 293.06 : x
  2. Step 2: Convert to fraction form
    489.43/675.55 = 293.06/x
  3. Step 3: Cross multiply
    489.43x = 675.55 × 293.06
  4. Step 4: Simplify right side
    489.43x = 197,973.31
  5. Step 5: Solve for x
    x = 197,973.31/489.43
  6. Step 6: Final answer
    x = 404.50

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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.