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Finding the Fourth Proportional to 611,919.70, 843,768.43 and 418,358.95

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Solution

The fourth proportional to 611,919.70, 843,768.43 and 418,358.95 is: 576,869.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,919.70 : 843,768.43 = 418,358.95 : x
  2. Step 2: Convert to fraction form
    611,919.70/843,768.43 = 418,358.95/x
  3. Step 3: Cross multiply
    611,919.70x = 843,768.43 × 418,358.95
  4. Step 4: Simplify right side
    611,919.70x = 352,998,074,417.95
  5. Step 5: Solve for x
    x = 352,998,074,417.95/611,919.70
  6. Step 6: Final answer
    x = 576,869.93

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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.