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Finding the Fourth Proportional to 378,028.30, 567,042.45 and 128,710.30

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Solution

The fourth proportional to 378,028.30, 567,042.45 and 128,710.30 is: 193,065.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,028.30 : 567,042.45 = 128,710.30 : x
  2. Step 2: Convert to fraction form
    378,028.30/567,042.45 = 128,710.30/x
  3. Step 3: Cross multiply
    378,028.30x = 567,042.45 × 128,710.30
  4. Step 4: Simplify right side
    378,028.30x = 72,984,203,852.24
  5. Step 5: Solve for x
    x = 72,984,203,852.24/378,028.30
  6. Step 6: Final answer
    x = 193,065.45

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Similar ratio
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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.