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Finding the Fourth Proportional to 489.99, 675.36 and 379.02

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Solution

The fourth proportional to 489.99, 675.36 and 379.02 is: 522.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.99 : 675.36 = 379.02 : x
  2. Step 2: Convert to fraction form
    489.99/675.36 = 379.02/x
  3. Step 3: Cross multiply
    489.99x = 675.36 × 379.02
  4. Step 4: Simplify right side
    489.99x = 255,974.95
  5. Step 5: Solve for x
    x = 255,974.95/489.99
  6. Step 6: Final answer
    x = 522.41

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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.