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Finding the Fourth Proportional to 624,982.40, 862,471.69 and 353,138.30

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Solution

The fourth proportional to 624,982.40, 862,471.69 and 353,138.30 is: 487,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,982.40 : 862,471.69 = 353,138.30 : x
  2. Step 2: Convert to fraction form
    624,982.40/862,471.69 = 353,138.30/x
  3. Step 3: Cross multiply
    624,982.40x = 862,471.69 × 353,138.30
  4. Step 4: Simplify right side
    624,982.40x = 304,571,781,209.52
  5. Step 5: Solve for x
    x = 304,571,781,209.52/624,982.40
  6. Step 6: Final answer
    x = 487,328.58

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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.