Home / 380,741.60-571,112.40-100,287.20

Finding the Fourth Proportional to 380,741.60, 571,112.40 and 100,287.20

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Solution

The fourth proportional to 380,741.60, 571,112.40 and 100,287.20 is: 150,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,741.60 : 571,112.40 = 100,287.20 : x
  2. Step 2: Convert to fraction form
    380,741.60/571,112.40 = 100,287.20/x
  3. Step 3: Cross multiply
    380,741.60x = 571,112.40 × 100,287.20
  4. Step 4: Simplify right side
    380,741.60x = 57,275,263,481.28
  5. Step 5: Solve for x
    x = 57,275,263,481.28/380,741.60
  6. Step 6: Final answer
    x = 150,430.80

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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.