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Finding the Fourth Proportional to 275,799.40, 413,699.10 and 205,815.40

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Solution

The fourth proportional to 275,799.40, 413,699.10 and 205,815.40 is: 308,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,799.40 : 413,699.10 = 205,815.40 : x
  2. Step 2: Convert to fraction form
    275,799.40/413,699.10 = 205,815.40/x
  3. Step 3: Cross multiply
    275,799.40x = 413,699.10 × 205,815.40
  4. Step 4: Simplify right side
    275,799.40x = 85,145,645,746.14
  5. Step 5: Solve for x
    x = 85,145,645,746.14/275,799.40
  6. Step 6: Final answer
    x = 308,723.10

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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.