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Finding the Fourth Proportional to 888.19, 1,225.78 and 489.92

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Solution

The fourth proportional to 888.19, 1,225.78 and 489.92 is: 676.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.19 : 1,225.78 = 489.92 : x
  2. Step 2: Convert to fraction form
    888.19/1,225.78 = 489.92/x
  3. Step 3: Cross multiply
    888.19x = 1,225.78 × 489.92
  4. Step 4: Simplify right side
    888.19x = 600,526.78
  5. Step 5: Solve for x
    x = 600,526.78/888.19
  6. Step 6: Final answer
    x = 676.13

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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.