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Finding the Fourth Proportional to 723.29, 1,084.81 and 260.99

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Solution

The fourth proportional to 723.29, 1,084.81 and 260.99 is: 391.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.29 : 1,084.81 = 260.99 : x
  2. Step 2: Convert to fraction form
    723.29/1,084.81 = 260.99/x
  3. Step 3: Cross multiply
    723.29x = 1,084.81 × 260.99
  4. Step 4: Simplify right side
    723.29x = 283,119.14
  5. Step 5: Solve for x
    x = 283,119.14/723.29
  6. Step 6: Final answer
    x = 391.43

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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.