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Finding the Fourth Proportional to 557,660, 769,574.40 and 303,011.12

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Solution

The fourth proportional to 557,660, 769,574.40 and 303,011.12 is: 418,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,660 : 769,574.40 = 303,011.12 : x
  2. Step 2: Convert to fraction form
    557,660/769,574.40 = 303,011.12/x
  3. Step 3: Cross multiply
    557,660x = 769,574.40 × 303,011.12
  4. Step 4: Simplify right side
    557,660x = 233,189,600,867.33
  5. Step 5: Solve for x
    x = 233,189,600,867.33/557,660
  6. Step 6: Final answer
    x = 418,157.30

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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.