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Finding the Fourth Proportional to 291,790.55, 402,771.42 and 170,970.95

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Solution

The fourth proportional to 291,790.55, 402,771.42 and 170,970.95 is: 235,998.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,790.55 : 402,771.42 = 170,970.95 : x
  2. Step 2: Convert to fraction form
    291,790.55/402,771.42 = 170,970.95/x
  3. Step 3: Cross multiply
    291,790.55x = 402,771.42 × 170,970.95
  4. Step 4: Simplify right side
    291,790.55x = 68,862,213,317.18
  5. Step 5: Solve for x
    x = 68,862,213,317.18/291,790.55
  6. Step 6: Final answer
    x = 235,998.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.