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Finding the Fourth Proportional to 581,687.20, 872,530.80 and 440,682.40

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Solution

The fourth proportional to 581,687.20, 872,530.80 and 440,682.40 is: 661,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,687.20 : 872,530.80 = 440,682.40 : x
  2. Step 2: Convert to fraction form
    581,687.20/872,530.80 = 440,682.40/x
  3. Step 3: Cross multiply
    581,687.20x = 872,530.80 × 440,682.40
  4. Step 4: Simplify right side
    581,687.20x = 384,508,967,017.92
  5. Step 5: Solve for x
    x = 384,508,967,017.92/581,687.20
  6. Step 6: Final answer
    x = 661,023.60

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Double scale
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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.