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Finding the Fourth Proportional to 636,919.74, 878,212.80 and 507,757.14

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Solution

The fourth proportional to 636,919.74, 878,212.80 and 507,757.14 is: 700,117.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,919.74 : 878,212.80 = 507,757.14 : x
  2. Step 2: Convert to fraction form
    636,919.74/878,212.80 = 507,757.14/x
  3. Step 3: Cross multiply
    636,919.74x = 878,212.80 × 507,757.14
  4. Step 4: Simplify right side
    636,919.74x = 445,918,819,639.39
  5. Step 5: Solve for x
    x = 445,918,819,639.39/636,919.74
  6. Step 6: Final answer
    x = 700,117.76

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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.