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Finding the Fourth Proportional to 651,738.60, 977,607.90 and 427,789.80

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Solution

The fourth proportional to 651,738.60, 977,607.90 and 427,789.80 is: 641,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,738.60 : 977,607.90 = 427,789.80 : x
  2. Step 2: Convert to fraction form
    651,738.60/977,607.90 = 427,789.80/x
  3. Step 3: Cross multiply
    651,738.60x = 977,607.90 × 427,789.80
  4. Step 4: Simplify right side
    651,738.60x = 418,210,688,019.42
  5. Step 5: Solve for x
    x = 418,210,688,019.42/651,738.60
  6. Step 6: Final answer
    x = 641,684.70

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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.