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Finding the Fourth Proportional to 521,396.02, 782,389.86 and 281,506.71

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Solution

The fourth proportional to 521,396.02, 782,389.86 and 281,506.71 is: 422,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,396.02 : 782,389.86 = 281,506.71 : x
  2. Step 2: Convert to fraction form
    521,396.02/782,389.86 = 281,506.71/x
  3. Step 3: Cross multiply
    521,396.02x = 782,389.86 × 281,506.71
  4. Step 4: Simplify right side
    521,396.02x = 220,247,995,425.96
  5. Step 5: Solve for x
    x = 220,247,995,425.96/521,396.02
  6. Step 6: Final answer
    x = 422,419.79

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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.