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Finding the Fourth Proportional to 647,986.80, 971,542.80 and 344,431.20

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Solution

The fourth proportional to 647,986.80, 971,542.80 and 344,431.20 is: 516,414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,986.80 : 971,542.80 = 344,431.20 : x
  2. Step 2: Convert to fraction form
    647,986.80/971,542.80 = 344,431.20/x
  3. Step 3: Cross multiply
    647,986.80x = 971,542.80 × 344,431.20
  4. Step 4: Simplify right side
    647,986.80x = 334,629,652,455.36
  5. Step 5: Solve for x
    x = 334,629,652,455.36/647,986.80
  6. Step 6: Final answer
    x = 516,414.30

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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.