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Finding the Fourth Proportional to 291,439.71, 436,598.69 and 178,790.98

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Solution

The fourth proportional to 291,439.71, 436,598.69 and 178,790.98 is: 267,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,439.71 : 436,598.69 = 178,790.98 : x
  2. Step 2: Convert to fraction form
    291,439.71/436,598.69 = 178,790.98/x
  3. Step 3: Cross multiply
    291,439.71x = 436,598.69 × 178,790.98
  4. Step 4: Simplify right side
    291,439.71x = 78,059,907,651.82
  5. Step 5: Solve for x
    x = 78,059,907,651.82/291,439.71
  6. Step 6: Final answer
    x = 267,842.39

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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.