Home / 398,836.15-550,401.37-217,554.55

Finding the Fourth Proportional to 398,836.15, 550,401.37 and 217,554.55

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Solution

The fourth proportional to 398,836.15, 550,401.37 and 217,554.55 is: 300,229.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,836.15 : 550,401.37 = 217,554.55 : x
  2. Step 2: Convert to fraction form
    398,836.15/550,401.37 = 217,554.55/x
  3. Step 3: Cross multiply
    398,836.15x = 550,401.37 × 217,554.55
  4. Step 4: Simplify right side
    398,836.15x = 119,742,320,449.84
  5. Step 5: Solve for x
    x = 119,742,320,449.84/398,836.15
  6. Step 6: Final answer
    x = 300,229.36

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1.5x scale

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.