Home / 861,327.56-1,291,991.74-387,459.40

Finding the Fourth Proportional to 861,327.56, 1,291,991.74 and 387,459.40

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Solution

The fourth proportional to 861,327.56, 1,291,991.74 and 387,459.40 is: 581,189.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,327.56 : 1,291,991.74 = 387,459.40 : x
  2. Step 2: Convert to fraction form
    861,327.56/1,291,991.74 = 387,459.40/x
  3. Step 3: Cross multiply
    861,327.56x = 1,291,991.74 × 387,459.40
  4. Step 4: Simplify right side
    861,327.56x = 500,594,344,385.36
  5. Step 5: Solve for x
    x = 500,594,344,385.36/861,327.56
  6. Step 6: Final answer
    x = 581,189.28

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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.