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Finding the Fourth Proportional to 630.11, 869.24 and 489.98

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Solution

The fourth proportional to 630.11, 869.24 and 489.98 is: 675.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.11 : 869.24 = 489.98 : x
  2. Step 2: Convert to fraction form
    630.11/869.24 = 489.98/x
  3. Step 3: Cross multiply
    630.11x = 869.24 × 489.98
  4. Step 4: Simplify right side
    630.11x = 425,907.09
  5. Step 5: Solve for x
    x = 425,907.09/630.11
  6. Step 6: Final answer
    x = 675.93

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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.