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Finding the Fourth Proportional to 625,281.46, 863,185.95 and 418,905.20

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Solution

The fourth proportional to 625,281.46, 863,185.95 and 418,905.20 is: 578,288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,281.46 : 863,185.95 = 418,905.20 : x
  2. Step 2: Convert to fraction form
    625,281.46/863,185.95 = 418,905.20/x
  3. Step 3: Cross multiply
    625,281.46x = 863,185.95 × 418,905.20
  4. Step 4: Simplify right side
    625,281.46x = 361,593,085,179.91
  5. Step 5: Solve for x
    x = 361,593,085,179.91/625,281.46
  6. Step 6: Final answer
    x = 578,288.51

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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.