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Finding the Fourth Proportional to 503,815.80, 755,723.70 and 291,239.40

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Solution

The fourth proportional to 503,815.80, 755,723.70 and 291,239.40 is: 436,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,815.80 : 755,723.70 = 291,239.40 : x
  2. Step 2: Convert to fraction form
    503,815.80/755,723.70 = 291,239.40/x
  3. Step 3: Cross multiply
    503,815.80x = 755,723.70 × 291,239.40
  4. Step 4: Simplify right side
    503,815.80x = 220,096,516,953.78
  5. Step 5: Solve for x
    x = 220,096,516,953.78/503,815.80
  6. Step 6: Final answer
    x = 436,859.10

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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.