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Finding the Fourth Proportional to 318,173.39, 439,053.30 and 187,330.38

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Solution

The fourth proportional to 318,173.39, 439,053.30 and 187,330.38 is: 258,500.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,173.39 : 439,053.30 = 187,330.38 : x
  2. Step 2: Convert to fraction form
    318,173.39/439,053.30 = 187,330.38/x
  3. Step 3: Cross multiply
    318,173.39x = 439,053.30 × 187,330.38
  4. Step 4: Simplify right side
    318,173.39x = 82,248,023,175.70
  5. Step 5: Solve for x
    x = 82,248,023,175.70/318,173.39
  6. Step 6: Final answer
    x = 258,500.64

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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.