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Finding the Fourth Proportional to 291,261.90, 436,892.85 and 80,901.90

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Solution

The fourth proportional to 291,261.90, 436,892.85 and 80,901.90 is: 121,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,261.90 : 436,892.85 = 80,901.90 : x
  2. Step 2: Convert to fraction form
    291,261.90/436,892.85 = 80,901.90/x
  3. Step 3: Cross multiply
    291,261.90x = 436,892.85 × 80,901.90
  4. Step 4: Simplify right side
    291,261.90x = 35,345,461,661.42
  5. Step 5: Solve for x
    x = 35,345,461,661.42/291,261.90
  6. Step 6: Final answer
    x = 121,352.85

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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.