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Finding the Fourth Proportional to 279,158.05, 385,219.15 and 151,830.91

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Solution

The fourth proportional to 279,158.05, 385,219.15 and 151,830.91 is: 209,516.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,158.05 : 385,219.15 = 151,830.91 : x
  2. Step 2: Convert to fraction form
    279,158.05/385,219.15 = 151,830.91/x
  3. Step 3: Cross multiply
    279,158.05x = 385,219.15 × 151,830.91
  4. Step 4: Simplify right side
    279,158.05x = 58,488,174,093.93
  5. Step 5: Solve for x
    x = 58,488,174,093.93/279,158.05
  6. Step 6: Final answer
    x = 209,516.34

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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.