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Finding the Fourth Proportional to 839.04, 1,257.36 and 351.52

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Solution

The fourth proportional to 839.04, 1,257.36 and 351.52 is: 526.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.04 : 1,257.36 = 351.52 : x
  2. Step 2: Convert to fraction form
    839.04/1,257.36 = 351.52/x
  3. Step 3: Cross multiply
    839.04x = 1,257.36 × 351.52
  4. Step 4: Simplify right side
    839.04x = 441,987.19
  5. Step 5: Solve for x
    x = 441,987.19/839.04
  6. Step 6: Final answer
    x = 526.78

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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.