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Finding the Fourth Proportional to 391,323.15, 540,110.43 and 238,411.35

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Solution

The fourth proportional to 391,323.15, 540,110.43 and 238,411.35 is: 329,059.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,323.15 : 540,110.43 = 238,411.35 : x
  2. Step 2: Convert to fraction form
    391,323.15/540,110.43 = 238,411.35/x
  3. Step 3: Cross multiply
    391,323.15x = 540,110.43 × 238,411.35
  4. Step 4: Simplify right side
    391,323.15x = 128,768,456,765.38
  5. Step 5: Solve for x
    x = 128,768,456,765.38/391,323.15
  6. Step 6: Final answer
    x = 329,059.13

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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.