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Finding the Fourth Proportional to 280,642.39, 422,858.69 and 231,816.40

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Solution

The fourth proportional to 280,642.39, 422,858.69 and 231,816.40 is: 349,290.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,642.39 : 422,858.69 = 231,816.40 : x
  2. Step 2: Convert to fraction form
    280,642.39/422,858.69 = 231,816.40/x
  3. Step 3: Cross multiply
    280,642.39x = 422,858.69 × 231,816.40
  4. Step 4: Simplify right side
    280,642.39x = 98,025,579,181.57
  5. Step 5: Solve for x
    x = 98,025,579,181.57/280,642.39
  6. Step 6: Final answer
    x = 349,290.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.