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Finding the Fourth Proportional to 291,340.97, 437,009.02 and 80,978.30

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Solution

The fourth proportional to 291,340.97, 437,009.02 and 80,978.30 is: 121,466.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,340.97 : 437,009.02 = 80,978.30 : x
  2. Step 2: Convert to fraction form
    291,340.97/437,009.02 = 80,978.30/x
  3. Step 3: Cross multiply
    291,340.97x = 437,009.02 × 80,978.30
  4. Step 4: Simplify right side
    291,340.97x = 35,388,247,524.27
  5. Step 5: Solve for x
    x = 35,388,247,524.27/291,340.97
  6. Step 6: Final answer
    x = 121,466.77

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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.