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Finding the Fourth Proportional to 521,712.20, 782,568.30 and 403,468.40

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Solution

The fourth proportional to 521,712.20, 782,568.30 and 403,468.40 is: 605,202.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,712.20 : 782,568.30 = 403,468.40 : x
  2. Step 2: Convert to fraction form
    521,712.20/782,568.30 = 403,468.40/x
  3. Step 3: Cross multiply
    521,712.20x = 782,568.30 × 403,468.40
  4. Step 4: Simplify right side
    521,712.20x = 315,741,579,891.72
  5. Step 5: Solve for x
    x = 315,741,579,891.72/521,712.20
  6. Step 6: Final answer
    x = 605,202.60

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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.