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Finding the Fourth Proportional to 415,760.40, 624,005.10 and 247,069.80

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Solution

The fourth proportional to 415,760.40, 624,005.10 and 247,069.80 is: 370,821.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,760.40 : 624,005.10 = 247,069.80 : x
  2. Step 2: Convert to fraction form
    415,760.40/624,005.10 = 247,069.80/x
  3. Step 3: Cross multiply
    415,760.40x = 624,005.10 × 247,069.80
  4. Step 4: Simplify right side
    415,760.40x = 154,172,815,255.98
  5. Step 5: Solve for x
    x = 154,172,815,255.98/415,760.40
  6. Step 6: Final answer
    x = 370,821.31

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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.