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Finding the Fourth Proportional to 647,541.20, 971,311.80 and 625,768.40

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Solution

The fourth proportional to 647,541.20, 971,311.80 and 625,768.40 is: 938,652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,541.20 : 971,311.80 = 625,768.40 : x
  2. Step 2: Convert to fraction form
    647,541.20/971,311.80 = 625,768.40/x
  3. Step 3: Cross multiply
    647,541.20x = 971,311.80 × 625,768.40
  4. Step 4: Simplify right side
    647,541.20x = 607,816,230,987.12
  5. Step 5: Solve for x
    x = 607,816,230,987.12/647,541.20
  6. Step 6: Final answer
    x = 938,652.60

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Similar ratio
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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.