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Finding the Fourth Proportional to 489.04, 675.33 and 445.30

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Solution

The fourth proportional to 489.04, 675.33 and 445.30 is: 614.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.04 : 675.33 = 445.30 : x
  2. Step 2: Convert to fraction form
    489.04/675.33 = 445.30/x
  3. Step 3: Cross multiply
    489.04x = 675.33 × 445.30
  4. Step 4: Simplify right side
    489.04x = 300,724.45
  5. Step 5: Solve for x
    x = 300,724.45/489.04
  6. Step 6: Final answer
    x = 614.93

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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.