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Finding the Fourth Proportional to 316,018.66, 436,105.90 and 172,779.88

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Solution

The fourth proportional to 316,018.66, 436,105.90 and 172,779.88 is: 238,436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,018.66 : 436,105.90 = 172,779.88 : x
  2. Step 2: Convert to fraction form
    316,018.66/436,105.90 = 172,779.88/x
  3. Step 3: Cross multiply
    316,018.66x = 436,105.90 × 172,779.88
  4. Step 4: Simplify right side
    316,018.66x = 75,350,325,069.29
  5. Step 5: Solve for x
    x = 75,350,325,069.29/316,018.66
  6. Step 6: Final answer
    x = 238,436.32

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1.5x scale

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.