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Finding the Fourth Proportional to 291,261.30, 436,017.15 and 172,871.70

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Solution

The fourth proportional to 291,261.30, 436,017.15 and 172,871.70 is: 258,788.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,261.30 : 436,017.15 = 172,871.70 : x
  2. Step 2: Convert to fraction form
    291,261.30/436,017.15 = 172,871.70/x
  3. Step 3: Cross multiply
    291,261.30x = 436,017.15 × 172,871.70
  4. Step 4: Simplify right side
    291,261.30x = 75,375,025,949.66
  5. Step 5: Solve for x
    x = 75,375,025,949.66/291,261.30
  6. Step 6: Final answer
    x = 258,788.33

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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.