Home / 429,084.20-643,626.30-409,401.20

Finding the Fourth Proportional to 429,084.20, 643,626.30 and 409,401.20

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Solution

The fourth proportional to 429,084.20, 643,626.30 and 409,401.20 is: 614,101.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,084.20 : 643,626.30 = 409,401.20 : x
  2. Step 2: Convert to fraction form
    429,084.20/643,626.30 = 409,401.20/x
  3. Step 3: Cross multiply
    429,084.20x = 643,626.30 × 409,401.20
  4. Step 4: Simplify right side
    429,084.20x = 263,501,379,571.56
  5. Step 5: Solve for x
    x = 263,501,379,571.56/429,084.20
  6. Step 6: Final answer
    x = 614,101.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.