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Finding the Fourth Proportional to 360,249.12, 540,261.36 and 135,640.80

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Solution

The fourth proportional to 360,249.12, 540,261.36 and 135,640.80 is: 203,418.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    360,249.12 : 540,261.36 = 135,640.80 : x
  2. Step 2: Convert to fraction form
    360,249.12/540,261.36 = 135,640.80/x
  3. Step 3: Cross multiply
    360,249.12x = 540,261.36 × 135,640.80
  4. Step 4: Simplify right side
    360,249.12x = 73,281,483,079.49
  5. Step 5: Solve for x
    x = 73,281,483,079.49/360,249.12
  6. Step 6: Final answer
    x = 203,418.91

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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.