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Finding the Fourth Proportional to 291,251.90, 436,877.85 and 172,862.30

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Solution

The fourth proportional to 291,251.90, 436,877.85 and 172,862.30 is: 259,293.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,251.90 : 436,877.85 = 172,862.30 : x
  2. Step 2: Convert to fraction form
    291,251.90/436,877.85 = 172,862.30/x
  3. Step 3: Cross multiply
    291,251.90x = 436,877.85 × 172,862.30
  4. Step 4: Simplify right side
    291,251.90x = 75,519,709,970.06
  5. Step 5: Solve for x
    x = 75,519,709,970.06/291,251.90
  6. Step 6: Final answer
    x = 259,293.45

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1.5x scale

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.