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Finding the Fourth Proportional to 419,391.40, 629,079.90 and 103,848.52

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Solution

The fourth proportional to 419,391.40, 629,079.90 and 103,848.52 is: 155,771.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,391.40 : 629,079.90 = 103,848.52 : x
  2. Step 2: Convert to fraction form
    419,391.40/629,079.90 = 103,848.52/x
  3. Step 3: Cross multiply
    419,391.40x = 629,079.90 × 103,848.52
  4. Step 4: Simplify right side
    419,391.40x = 65,329,016,576.75
  5. Step 5: Solve for x
    x = 65,329,016,576.75/419,391.40
  6. Step 6: Final answer
    x = 155,771.00

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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.