Home / 398,690.28-550,188.57-217,401.75

Finding the Fourth Proportional to 398,690.28, 550,188.57 and 217,401.75

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Solution

The fourth proportional to 398,690.28, 550,188.57 and 217,401.75 is: 300,012.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,690.28 : 550,188.57 = 217,401.75 : x
  2. Step 2: Convert to fraction form
    398,690.28/550,188.57 = 217,401.75/x
  3. Step 3: Cross multiply
    398,690.28x = 550,188.57 × 217,401.75
  4. Step 4: Simplify right side
    398,690.28x = 119,611,957,948.00
  5. Step 5: Solve for x
    x = 119,611,957,948.00/398,690.28
  6. Step 6: Final answer
    x = 300,012.22

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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.