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Finding the Fourth Proportional to 291,228.88, 436,686.72 and 171,327.28

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Solution

The fourth proportional to 291,228.88, 436,686.72 and 171,327.28 is: 256,898.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,228.88 : 436,686.72 = 171,327.28 : x
  2. Step 2: Convert to fraction form
    291,228.88/436,686.72 = 171,327.28/x
  3. Step 3: Cross multiply
    291,228.88x = 436,686.72 × 171,327.28
  4. Step 4: Simplify right side
    291,228.88x = 74,816,347,949.72
  5. Step 5: Solve for x
    x = 74,816,347,949.72/291,228.88
  6. Step 6: Final answer
    x = 256,898.79

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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.