Home / 419,905,719.40-629,858,579.10-288,391,786.60

Finding the Fourth Proportional to 419,905,719.40, 629,858,579.10 and 288,391,786.60

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Solution

The fourth proportional to 419,905,719.40, 629,858,579.10 and 288,391,786.60 is: 432,587,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,719.40 : 629,858,579.10 = 288,391,786.60 : x
  2. Step 2: Convert to fraction form
    419,905,719.40/629,858,579.10 = 288,391,786.60/x
  3. Step 3: Cross multiply
    419,905,719.40x = 629,858,579.10 × 288,391,786.60
  4. Step 4: Simplify right side
    419,905,719.40x = 181,646,040,931,986,432
  5. Step 5: Solve for x
    x = 181,646,040,931,986,432/419,905,719.40
  6. Step 6: Final answer
    x = 432,587,679.90

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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.