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Finding the Fourth Proportional to 709,896.05, 979,649.12 and 387,605.15

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Solution

The fourth proportional to 709,896.05, 979,649.12 and 387,605.15 is: 534,891.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,896.05 : 979,649.12 = 387,605.15 : x
  2. Step 2: Convert to fraction form
    709,896.05/979,649.12 = 387,605.15/x
  3. Step 3: Cross multiply
    709,896.05x = 979,649.12 × 387,605.15
  4. Step 4: Simplify right side
    709,896.05x = 379,717,037,268.70
  5. Step 5: Solve for x
    x = 379,717,037,268.70/709,896.05
  6. Step 6: Final answer
    x = 534,891.04

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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.