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Finding the Fourth Proportional to 521,100.14, 781,400.52 and 254,548.58

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Solution

The fourth proportional to 521,100.14, 781,400.52 and 254,548.58 is: 381,700.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,100.14 : 781,400.52 = 254,548.58 : x
  2. Step 2: Convert to fraction form
    521,100.14/781,400.52 = 254,548.58/x
  3. Step 3: Cross multiply
    521,100.14x = 781,400.52 × 254,548.58
  4. Step 4: Simplify right side
    521,100.14x = 198,904,388,870.26
  5. Step 5: Solve for x
    x = 198,904,388,870.26/521,100.14
  6. Step 6: Final answer
    x = 381,700.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.