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Finding the Fourth Proportional to 291,690.42, 437,599.83 and 89,288.12

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Solution

The fourth proportional to 291,690.42, 437,599.83 and 89,288.12 is: 133,951.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,690.42 : 437,599.83 = 89,288.12 : x
  2. Step 2: Convert to fraction form
    291,690.42/437,599.83 = 89,288.12/x
  3. Step 3: Cross multiply
    291,690.42x = 437,599.83 × 89,288.12
  4. Step 4: Simplify right side
    291,690.42x = 39,072,467,561.85
  5. Step 5: Solve for x
    x = 39,072,467,561.85/291,690.42
  6. Step 6: Final answer
    x = 133,951.84

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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.