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Finding the Fourth Proportional to 316,187.91, 436,330.08 and 172,944.90

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Solution

The fourth proportional to 316,187.91, 436,330.08 and 172,944.90 is: 238,658.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,187.91 : 436,330.08 = 172,944.90 : x
  2. Step 2: Convert to fraction form
    316,187.91/436,330.08 = 172,944.90/x
  3. Step 3: Cross multiply
    316,187.91x = 436,330.08 × 172,944.90
  4. Step 4: Simplify right side
    316,187.91x = 75,461,062,052.59
  5. Step 5: Solve for x
    x = 75,461,062,052.59/316,187.91
  6. Step 6: Final answer
    x = 238,658.91

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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.