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Finding the Fourth Proportional to 798.32, 1,101.68 and 439.42

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Solution

The fourth proportional to 798.32, 1,101.68 and 439.42 is: 606.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.32 : 1,101.68 = 439.42 : x
  2. Step 2: Convert to fraction form
    798.32/1,101.68 = 439.42/x
  3. Step 3: Cross multiply
    798.32x = 1,101.68 × 439.42
  4. Step 4: Simplify right side
    798.32x = 484,100.23
  5. Step 5: Solve for x
    x = 484,100.23/798.32
  6. Step 6: Final answer
    x = 606.40

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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.