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Finding the Fourth Proportional to 647,431.20, 970,855.20 and 247,939.20

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Solution

The fourth proportional to 647,431.20, 970,855.20 and 247,939.20 is: 371,797.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,431.20 : 970,855.20 = 247,939.20 : x
  2. Step 2: Convert to fraction form
    647,431.20/970,855.20 = 247,939.20/x
  3. Step 3: Cross multiply
    647,431.20x = 970,855.20 × 247,939.20
  4. Step 4: Simplify right side
    647,431.20x = 240,713,061,603.84
  5. Step 5: Solve for x
    x = 240,713,061,603.84/647,431.20
  6. Step 6: Final answer
    x = 371,797.13

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1.5x scale

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.