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Finding the Fourth Proportional to 291,236.79, 436,854.87 and 91,574.61

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Solution

The fourth proportional to 291,236.79, 436,854.87 and 91,574.61 is: 137,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,236.79 : 436,854.87 = 91,574.61 : x
  2. Step 2: Convert to fraction form
    291,236.79/436,854.87 = 91,574.61/x
  3. Step 3: Cross multiply
    291,236.79x = 436,854.87 × 91,574.61
  4. Step 4: Simplify right side
    291,236.79x = 40,004,814,346.85
  5. Step 5: Solve for x
    x = 40,004,814,346.85/291,236.79
  6. Step 6: Final answer
    x = 137,361.82

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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.