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Finding the Fourth Proportional to 308,258.40, 462,272.40 and 121,231.20

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Solution

The fourth proportional to 308,258.40, 462,272.40 and 121,231.20 is: 181,801.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,258.40 : 462,272.40 = 121,231.20 : x
  2. Step 2: Convert to fraction form
    308,258.40/462,272.40 = 121,231.20/x
  3. Step 3: Cross multiply
    308,258.40x = 462,272.40 × 121,231.20
  4. Step 4: Simplify right side
    308,258.40x = 56,041,837,778.88
  5. Step 5: Solve for x
    x = 56,041,837,778.88/308,258.40
  6. Step 6: Final answer
    x = 181,801.49

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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.