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Finding the Fourth Proportional to 557,769.69, 769,728.15 and 303,120.90

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Solution

The fourth proportional to 557,769.69, 769,728.15 and 303,120.90 is: 418,310.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,769.69 : 769,728.15 = 303,120.90 : x
  2. Step 2: Convert to fraction form
    557,769.69/769,728.15 = 303,120.90/x
  3. Step 3: Cross multiply
    557,769.69x = 769,728.15 × 303,120.90
  4. Step 4: Simplify right side
    557,769.69x = 233,320,689,583.34
  5. Step 5: Solve for x
    x = 233,320,689,583.34/557,769.69
  6. Step 6: Final answer
    x = 418,310.09

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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.