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Finding the Fourth Proportional to 521,504.70, 782,257.05 and 403,260.90

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Solution

The fourth proportional to 521,504.70, 782,257.05 and 403,260.90 is: 604,891.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,504.70 : 782,257.05 = 403,260.90 : x
  2. Step 2: Convert to fraction form
    521,504.70/782,257.05 = 403,260.90/x
  3. Step 3: Cross multiply
    521,504.70x = 782,257.05 × 403,260.90
  4. Step 4: Simplify right side
    521,504.70x = 315,453,682,014.35
  5. Step 5: Solve for x
    x = 315,453,682,014.35/521,504.70
  6. Step 6: Final answer
    x = 604,891.35

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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.