Home / 521,108.20-781,662.30-403,010.20

Finding the Fourth Proportional to 521,108.20, 781,662.30 and 403,010.20

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Solution

The fourth proportional to 521,108.20, 781,662.30 and 403,010.20 is: 604,515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,108.20 : 781,662.30 = 403,010.20 : x
  2. Step 2: Convert to fraction form
    521,108.20/781,662.30 = 403,010.20/x
  3. Step 3: Cross multiply
    521,108.20x = 781,662.30 × 403,010.20
  4. Step 4: Simplify right side
    521,108.20x = 315,017,879,855.46
  5. Step 5: Solve for x
    x = 315,017,879,855.46/521,108.20
  6. Step 6: Final answer
    x = 604,515.30

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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.