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Finding the Fourth Proportional to 571,235.70, 856,853.55 and 479,997.30

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Solution

The fourth proportional to 571,235.70, 856,853.55 and 479,997.30 is: 719,995.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,235.70 : 856,853.55 = 479,997.30 : x
  2. Step 2: Convert to fraction form
    571,235.70/856,853.55 = 479,997.30/x
  3. Step 3: Cross multiply
    571,235.70x = 856,853.55 × 479,997.30
  4. Step 4: Simplify right side
    571,235.70x = 411,287,390,495.42
  5. Step 5: Solve for x
    x = 411,287,390,495.42/571,235.70
  6. Step 6: Final answer
    x = 719,995.95

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Half scale
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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.