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Finding the Fourth Proportional to 846.61, 1,269.87 and 326.51

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Solution

The fourth proportional to 846.61, 1,269.87 and 326.51 is: 489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.61 : 1,269.87 = 326.51 : x
  2. Step 2: Convert to fraction form
    846.61/1,269.87 = 326.51/x
  3. Step 3: Cross multiply
    846.61x = 1,269.87 × 326.51
  4. Step 4: Simplify right side
    846.61x = 414,625.25
  5. Step 5: Solve for x
    x = 414,625.25/846.61
  6. Step 6: Final answer
    x = 489.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.