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Finding the Fourth Proportional to 489.88, 740.41 and 489.88

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Solution

The fourth proportional to 489.88, 740.41 and 489.88 is: 740.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.88 : 740.41 = 489.88 : x
  2. Step 2: Convert to fraction form
    489.88/740.41 = 489.88/x
  3. Step 3: Cross multiply
    489.88x = 740.41 × 489.88
  4. Step 4: Simplify right side
    489.88x = 362,712.05
  5. Step 5: Solve for x
    x = 362,712.05/489.88
  6. Step 6: Final answer
    x = 740.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.