Home / 398,905.90-550,449.75-245,919.58

Finding the Fourth Proportional to 398,905.90, 550,449.75 and 245,919.58

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Solution

The fourth proportional to 398,905.90, 550,449.75 and 245,919.58 is: 339,344.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,905.90 : 550,449.75 = 245,919.58 : x
  2. Step 2: Convert to fraction form
    398,905.90/550,449.75 = 245,919.58/x
  3. Step 3: Cross multiply
    398,905.90x = 550,449.75 × 245,919.58
  4. Step 4: Simplify right side
    398,905.90x = 135,366,371,331.11
  5. Step 5: Solve for x
    x = 135,366,371,331.11/398,905.90
  6. Step 6: Final answer
    x = 339,344.12

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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.