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Finding the Fourth Proportional to 572,810.40, 859,215.60 and 440,359.20

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Solution

The fourth proportional to 572,810.40, 859,215.60 and 440,359.20 is: 660,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,810.40 : 859,215.60 = 440,359.20 : x
  2. Step 2: Convert to fraction form
    572,810.40/859,215.60 = 440,359.20/x
  3. Step 3: Cross multiply
    572,810.40x = 859,215.60 × 440,359.20
  4. Step 4: Simplify right side
    572,810.40x = 378,363,494,243.52
  5. Step 5: Solve for x
    x = 378,363,494,243.52/572,810.40
  6. Step 6: Final answer
    x = 660,538.80

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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.