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Finding the Fourth Proportional to 1,148.55, 1,722.31 and 326.63

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Solution

The fourth proportional to 1,148.55, 1,722.31 and 326.63 is: 489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.55 : 1,722.31 = 326.63 : x
  2. Step 2: Convert to fraction form
    1,148.55/1,722.31 = 326.63/x
  3. Step 3: Cross multiply
    1,148.55x = 1,722.31 × 326.63
  4. Step 4: Simplify right side
    1,148.55x = 562,555.15
  5. Step 5: Solve for x
    x = 562,555.15/1,148.55
  6. Step 6: Final answer
    x = 489.80

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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.