Home / 380,439.20-570,615.60-99,984.80

Finding the Fourth Proportional to 380,439.20, 570,615.60 and 99,984.80

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Solution

The fourth proportional to 380,439.20, 570,615.60 and 99,984.80 is: 149,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,439.20 : 570,615.60 = 99,984.80 : x
  2. Step 2: Convert to fraction form
    380,439.20/570,615.60 = 99,984.80/x
  3. Step 3: Cross multiply
    380,439.20x = 570,615.60 × 99,984.80
  4. Step 4: Simplify right side
    380,439.20x = 57,052,886,642.88
  5. Step 5: Solve for x
    x = 57,052,886,642.88/380,439.20
  6. Step 6: Final answer
    x = 149,965.85

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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.