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Finding the Fourth Proportional to 519,216.90, 778,821.57 and 279,443.40

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Solution

The fourth proportional to 519,216.90, 778,821.57 and 279,443.40 is: 419,163.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,216.90 : 778,821.57 = 279,443.40 : x
  2. Step 2: Convert to fraction form
    519,216.90/778,821.57 = 279,443.40/x
  3. Step 3: Cross multiply
    519,216.90x = 778,821.57 × 279,443.40
  4. Step 4: Simplify right side
    519,216.90x = 217,636,547,514.14
  5. Step 5: Solve for x
    x = 217,636,547,514.14/519,216.90
  6. Step 6: Final answer
    x = 419,163.07

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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.