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Finding the Fourth Proportional to 341,662.80, 512,507.68 and 128,409.20

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Solution

The fourth proportional to 341,662.80, 512,507.68 and 128,409.20 is: 192,618.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,662.80 : 512,507.68 = 128,409.20 : x
  2. Step 2: Convert to fraction form
    341,662.80/512,507.68 = 128,409.20/x
  3. Step 3: Cross multiply
    341,662.80x = 512,507.68 × 128,409.20
  4. Step 4: Simplify right side
    341,662.80x = 65,810,701,182.66
  5. Step 5: Solve for x
    x = 65,810,701,182.66/341,662.80
  6. Step 6: Final answer
    x = 192,618.87

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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.