Home / 398,820.11-550,378.23-217,531.98

Finding the Fourth Proportional to 398,820.11, 550,378.23 and 217,531.98

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Solution

The fourth proportional to 398,820.11, 550,378.23 and 217,531.98 is: 300,197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,820.11 : 550,378.23 = 217,531.98 : x
  2. Step 2: Convert to fraction form
    398,820.11/550,378.23 = 217,531.98/x
  3. Step 3: Cross multiply
    398,820.11x = 550,378.23 × 217,531.98
  4. Step 4: Simplify right side
    398,820.11x = 119,724,866,120.80
  5. Step 5: Solve for x
    x = 119,724,866,120.80/398,820.11
  6. Step 6: Final answer
    x = 300,197.67

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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.