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Finding the Fourth Proportional to 557,998.13, 770,043.87 and 309,645.17

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Solution

The fourth proportional to 557,998.13, 770,043.87 and 309,645.17 is: 427,313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,998.13 : 770,043.87 = 309,645.17 : x
  2. Step 2: Convert to fraction form
    557,998.13/770,043.87 = 309,645.17/x
  3. Step 3: Cross multiply
    557,998.13x = 770,043.87 × 309,645.17
  4. Step 4: Simplify right side
    557,998.13x = 238,440,361,183.39
  5. Step 5: Solve for x
    x = 238,440,361,183.39/557,998.13
  6. Step 6: Final answer
    x = 427,313.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.