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Finding the Fourth Proportional to 882.93, 1,218.45 and 489.95

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Solution

The fourth proportional to 882.93, 1,218.45 and 489.95 is: 676.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.93 : 1,218.45 = 489.95 : x
  2. Step 2: Convert to fraction form
    882.93/1,218.45 = 489.95/x
  3. Step 3: Cross multiply
    882.93x = 1,218.45 × 489.95
  4. Step 4: Simplify right side
    882.93x = 596,983.99
  5. Step 5: Solve for x
    x = 596,983.99/882.93
  6. Step 6: Final answer
    x = 676.14

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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.