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Finding the Fourth Proportional to 265,616.80, 398,425.20 and 99,383.20

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Solution

The fourth proportional to 265,616.80, 398,425.20 and 99,383.20 is: 149,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,616.80 : 398,425.20 = 99,383.20 : x
  2. Step 2: Convert to fraction form
    265,616.80/398,425.20 = 99,383.20/x
  3. Step 3: Cross multiply
    265,616.80x = 398,425.20 × 99,383.20
  4. Step 4: Simplify right side
    265,616.80x = 39,596,771,336.64
  5. Step 5: Solve for x
    x = 39,596,771,336.64/265,616.80
  6. Step 6: Final answer
    x = 149,074.80

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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.