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Finding the Fourth Proportional to 391,633.36, 540,538.12 and 238,721.36

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Solution

The fourth proportional to 391,633.36, 540,538.12 and 238,721.36 is: 329,486.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,633.36 : 540,538.12 = 238,721.36 : x
  2. Step 2: Convert to fraction form
    391,633.36/540,538.12 = 238,721.36/x
  3. Step 3: Cross multiply
    391,633.36x = 540,538.12 × 238,721.36
  4. Step 4: Simplify right side
    391,633.36x = 129,037,995,138.24
  5. Step 5: Solve for x
    x = 129,037,995,138.24/391,633.36
  6. Step 6: Final answer
    x = 329,486.73

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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.