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Finding the Fourth Proportional to 391,873.59, 540,785.70 and 222,108.93

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Solution

The fourth proportional to 391,873.59, 540,785.70 and 222,108.93 is: 306,510.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,873.59 : 540,785.70 = 222,108.93 : x
  2. Step 2: Convert to fraction form
    391,873.59/540,785.70 = 222,108.93/x
  3. Step 3: Cross multiply
    391,873.59x = 540,785.70 × 222,108.93
  4. Step 4: Simplify right side
    391,873.59x = 120,113,333,186.30
  5. Step 5: Solve for x
    x = 120,113,333,186.30/391,873.59
  6. Step 6: Final answer
    x = 306,510.41

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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.