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Finding the Fourth Proportional to 656,086.55, 899,494.59 and 644,129.12

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Solution

The fourth proportional to 656,086.55, 899,494.59 and 644,129.12 is: 883,100.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,086.55 : 899,494.59 = 644,129.12 : x
  2. Step 2: Convert to fraction form
    656,086.55/899,494.59 = 644,129.12/x
  3. Step 3: Cross multiply
    656,086.55x = 899,494.59 × 644,129.12
  4. Step 4: Simplify right side
    656,086.55x = 579,390,663,365.68
  5. Step 5: Solve for x
    x = 579,390,663,365.68/656,086.55
  6. Step 6: Final answer
    x = 883,100.97

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.