Home / 538,105.04-742,584.92-311,881.76

Finding the Fourth Proportional to 538,105.04, 742,584.92 and 311,881.76

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Solution

The fourth proportional to 538,105.04, 742,584.92 and 311,881.76 is: 430,396.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,105.04 : 742,584.92 = 311,881.76 : x
  2. Step 2: Convert to fraction form
    538,105.04/742,584.92 = 311,881.76/x
  3. Step 3: Cross multiply
    538,105.04x = 742,584.92 × 311,881.76
  4. Step 4: Simplify right side
    538,105.04x = 231,598,691,799.06
  5. Step 5: Solve for x
    x = 231,598,691,799.06/538,105.04
  6. Step 6: Final answer
    x = 430,396.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.