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Finding the Fourth Proportional to 378,046.20, 567,069.30 and 128,728.20

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Solution

The fourth proportional to 378,046.20, 567,069.30 and 128,728.20 is: 193,092.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,046.20 : 567,069.30 = 128,728.20 : x
  2. Step 2: Convert to fraction form
    378,046.20/567,069.30 = 128,728.20/x
  3. Step 3: Cross multiply
    378,046.20x = 567,069.30 × 128,728.20
  4. Step 4: Simplify right side
    378,046.20x = 72,997,810,264.26
  5. Step 5: Solve for x
    x = 72,997,810,264.26/378,046.20
  6. Step 6: Final answer
    x = 193,092.30

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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.