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Finding the Fourth Proportional to 500,751.28, 751,128.20 and 126,774.32

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Solution

The fourth proportional to 500,751.28, 751,128.20 and 126,774.32 is: 190,161.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,751.28 : 751,128.20 = 126,774.32 : x
  2. Step 2: Convert to fraction form
    500,751.28/751,128.20 = 126,774.32/x
  3. Step 3: Cross multiply
    500,751.28x = 751,128.20 × 126,774.32
  4. Step 4: Simplify right side
    500,751.28x = 95,223,766,787.82
  5. Step 5: Solve for x
    x = 95,223,766,787.82/500,751.28
  6. Step 6: Final answer
    x = 190,161.80

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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.