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Finding the Fourth Proportional to 625,878.90, 863,713.38 and 339,398.91

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Solution

The fourth proportional to 625,878.90, 863,713.38 and 339,398.91 is: 468,370.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,878.90 : 863,713.38 = 339,398.91 : x
  2. Step 2: Convert to fraction form
    625,878.90/863,713.38 = 339,398.91/x
  3. Step 3: Cross multiply
    625,878.90x = 863,713.38 × 339,398.91
  4. Step 4: Simplify right side
    625,878.90x = 293,143,379,088.04
  5. Step 5: Solve for x
    x = 293,143,379,088.04/625,878.90
  6. Step 6: Final answer
    x = 468,370.76

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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.