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Finding the Fourth Proportional to 882.94, 1,218.45 and 489.99

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Solution

The fourth proportional to 882.94, 1,218.45 and 489.99 is: 676.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.94 : 1,218.45 = 489.99 : x
  2. Step 2: Convert to fraction form
    882.94/1,218.45 = 489.99/x
  3. Step 3: Cross multiply
    882.94x = 1,218.45 × 489.99
  4. Step 4: Simplify right side
    882.94x = 597,025.58
  5. Step 5: Solve for x
    x = 597,025.58/882.94
  6. Step 6: Final answer
    x = 676.18

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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.