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Finding the Fourth Proportional to 317,896.20, 476,844.30 and 81,257.40

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Solution

The fourth proportional to 317,896.20, 476,844.30 and 81,257.40 is: 121,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,896.20 : 476,844.30 = 81,257.40 : x
  2. Step 2: Convert to fraction form
    317,896.20/476,844.30 = 81,257.40/x
  3. Step 3: Cross multiply
    317,896.20x = 476,844.30 × 81,257.40
  4. Step 4: Simplify right side
    317,896.20x = 38,747,128,022.82
  5. Step 5: Solve for x
    x = 38,747,128,022.82/317,896.20
  6. Step 6: Final answer
    x = 121,886.10

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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.