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Finding the Fourth Proportional to 291,236.61, 436,854.54 and 91,574.46

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Solution

The fourth proportional to 291,236.61, 436,854.54 and 91,574.46 is: 137,361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,236.61 : 436,854.54 = 91,574.46 : x
  2. Step 2: Convert to fraction form
    291,236.61/436,854.54 = 91,574.46/x
  3. Step 3: Cross multiply
    291,236.61x = 436,854.54 × 91,574.46
  4. Step 4: Simplify right side
    291,236.61x = 40,004,718,599.05
  5. Step 5: Solve for x
    x = 40,004,718,599.05/291,236.61
  6. Step 6: Final answer
    x = 137,361.57

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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.