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Finding the Fourth Proportional to 625,886.90, 863,724.15 and 339,406.91

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Solution

The fourth proportional to 625,886.90, 863,724.15 and 339,406.91 is: 468,381.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,886.90 : 863,724.15 = 339,406.91 : x
  2. Step 2: Convert to fraction form
    625,886.90/863,724.15 = 339,406.91/x
  3. Step 3: Cross multiply
    625,886.90x = 863,724.15 × 339,406.91
  4. Step 4: Simplify right side
    625,886.90x = 293,153,940,525.26
  5. Step 5: Solve for x
    x = 293,153,940,525.26/625,886.90
  6. Step 6: Final answer
    x = 468,381.66

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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.