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Finding the Fourth Proportional to 500,781.28, 751,173.20 and 126,804.32

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Solution

The fourth proportional to 500,781.28, 751,173.20 and 126,804.32 is: 190,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,781.28 : 751,173.20 = 126,804.32 : x
  2. Step 2: Convert to fraction form
    500,781.28/751,173.20 = 126,804.32/x
  3. Step 3: Cross multiply
    500,781.28x = 751,173.20 × 126,804.32
  4. Step 4: Simplify right side
    500,781.28x = 95,252,006,828.22
  5. Step 5: Solve for x
    x = 95,252,006,828.22/500,781.28
  6. Step 6: Final answer
    x = 190,206.80

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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.