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Finding the Fourth Proportional to 557,778.69, 769,740.57 and 303,129.90

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Solution

The fourth proportional to 557,778.69, 769,740.57 and 303,129.90 is: 418,322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,778.69 : 769,740.57 = 303,129.90 : x
  2. Step 2: Convert to fraction form
    557,778.69/769,740.57 = 303,129.90/x
  3. Step 3: Cross multiply
    557,778.69x = 769,740.57 × 303,129.90
  4. Step 4: Simplify right side
    557,778.69x = 233,331,382,010.04
  5. Step 5: Solve for x
    x = 233,331,382,010.04/557,778.69
  6. Step 6: Final answer
    x = 418,322.51

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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.