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Finding the Fourth Proportional to 323,415.20, 485,122.80 and 113,031.20

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Solution

The fourth proportional to 323,415.20, 485,122.80 and 113,031.20 is: 169,546.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,415.20 : 485,122.80 = 113,031.20 : x
  2. Step 2: Convert to fraction form
    323,415.20/485,122.80 = 113,031.20/x
  3. Step 3: Cross multiply
    323,415.20x = 485,122.80 × 113,031.20
  4. Step 4: Simplify right side
    323,415.20x = 54,834,012,231.36
  5. Step 5: Solve for x
    x = 54,834,012,231.36/323,415.20
  6. Step 6: Final answer
    x = 169,546.80

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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.