Home / 861,133.90-1,291,991.23-381,296.19

Finding the Fourth Proportional to 861,133.90, 1,291,991.23 and 381,296.19

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Solution

The fourth proportional to 861,133.90, 1,291,991.23 and 381,296.19 is: 572,072.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,133.90 : 1,291,991.23 = 381,296.19 : x
  2. Step 2: Convert to fraction form
    861,133.90/1,291,991.23 = 381,296.19/x
  3. Step 3: Cross multiply
    861,133.90x = 1,291,991.23 × 381,296.19
  4. Step 4: Simplify right side
    861,133.90x = 492,631,333,512.41
  5. Step 5: Solve for x
    x = 492,631,333,512.41/861,133.90
  6. Step 6: Final answer
    x = 572,072.86

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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.