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Finding the Fourth Proportional to 538,144.50, 742,639.44 and 311,921.22

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Solution

The fourth proportional to 538,144.50, 742,639.44 and 311,921.22 is: 430,451.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,144.50 : 742,639.44 = 311,921.22 : x
  2. Step 2: Convert to fraction form
    538,144.50/742,639.44 = 311,921.22/x
  3. Step 3: Cross multiply
    538,144.50x = 742,639.44 × 311,921.22
  4. Step 4: Simplify right side
    538,144.50x = 231,645,000,144.92
  5. Step 5: Solve for x
    x = 231,645,000,144.92/538,144.50
  6. Step 6: Final answer
    x = 430,451.30

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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.