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Finding the Fourth Proportional to 291,856.80, 437,785.20 and 81,494.40

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Solution

The fourth proportional to 291,856.80, 437,785.20 and 81,494.40 is: 122,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,856.80 : 437,785.20 = 81,494.40 : x
  2. Step 2: Convert to fraction form
    291,856.80/437,785.20 = 81,494.40/x
  3. Step 3: Cross multiply
    291,856.80x = 437,785.20 × 81,494.40
  4. Step 4: Simplify right side
    291,856.80x = 35,677,042,202.88
  5. Step 5: Solve for x
    x = 35,677,042,202.88/291,856.80
  6. Step 6: Final answer
    x = 122,241.60

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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.