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Finding the Fourth Proportional to 291,455.74, 437,199.20 and 91,791.66

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Solution

The fourth proportional to 291,455.74, 437,199.20 and 91,791.66 is: 137,692.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,455.74 : 437,199.20 = 91,791.66 : x
  2. Step 2: Convert to fraction form
    291,455.74/437,199.20 = 91,791.66/x
  3. Step 3: Cross multiply
    291,455.74x = 437,199.20 × 91,791.66
  4. Step 4: Simplify right side
    291,455.74x = 40,131,240,318.67
  5. Step 5: Solve for x
    x = 40,131,240,318.67/291,455.74
  6. Step 6: Final answer
    x = 137,692.40

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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.