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Finding the Fourth Proportional to 647,240.80, 970,515.60 and 272,840.80

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Solution

The fourth proportional to 647,240.80, 970,515.60 and 272,840.80 is: 409,115.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,240.80 : 970,515.60 = 272,840.80 : x
  2. Step 2: Convert to fraction form
    647,240.80/970,515.60 = 272,840.80/x
  3. Step 3: Cross multiply
    647,240.80x = 970,515.60 × 272,840.80
  4. Step 4: Simplify right side
    647,240.80x = 264,796,252,716.48
  5. Step 5: Solve for x
    x = 264,796,252,716.48/647,240.80
  6. Step 6: Final answer
    x = 409,115.51

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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.