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Finding the Fourth Proportional to 321,335.40, 482,003.10 and 121,662.30

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Solution

The fourth proportional to 321,335.40, 482,003.10 and 121,662.30 is: 182,493.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,335.40 : 482,003.10 = 121,662.30 : x
  2. Step 2: Convert to fraction form
    321,335.40/482,003.10 = 121,662.30/x
  3. Step 3: Cross multiply
    321,335.40x = 482,003.10 × 121,662.30
  4. Step 4: Simplify right side
    321,335.40x = 58,641,605,753.13
  5. Step 5: Solve for x
    x = 58,641,605,753.13/321,335.40
  6. Step 6: Final answer
    x = 182,493.45

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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.