Home / 398,824.85-550,380-217,540.67

Finding the Fourth Proportional to 398,824.85, 550,380 and 217,540.67

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Solution

The fourth proportional to 398,824.85, 550,380 and 217,540.67 is: 300,207.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,824.85 : 550,380 = 217,540.67 : x
  2. Step 2: Convert to fraction form
    398,824.85/550,380 = 217,540.67/x
  3. Step 3: Cross multiply
    398,824.85x = 550,380 × 217,540.67
  4. Step 4: Simplify right side
    398,824.85x = 119,730,035,330.55
  5. Step 5: Solve for x
    x = 119,730,035,330.55/398,824.85
  6. Step 6: Final answer
    x = 300,207.06

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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.