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Finding the Fourth Proportional to 345,404.80, 518,107.20 and 205,091.20

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Solution

The fourth proportional to 345,404.80, 518,107.20 and 205,091.20 is: 307,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,404.80 : 518,107.20 = 205,091.20 : x
  2. Step 2: Convert to fraction form
    345,404.80/518,107.20 = 205,091.20/x
  3. Step 3: Cross multiply
    345,404.80x = 518,107.20 × 205,091.20
  4. Step 4: Simplify right side
    345,404.80x = 106,259,227,376.64
  5. Step 5: Solve for x
    x = 106,259,227,376.64/345,404.80
  6. Step 6: Final answer
    x = 307,636.80

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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.