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Finding the Fourth Proportional to 557,338.75, 769,174.91 and 315,664.31

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Solution

The fourth proportional to 557,338.75, 769,174.91 and 315,664.31 is: 435,643.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,338.75 : 769,174.91 = 315,664.31 : x
  2. Step 2: Convert to fraction form
    557,338.75/769,174.91 = 315,664.31/x
  3. Step 3: Cross multiply
    557,338.75x = 769,174.91 × 315,664.31
  4. Step 4: Simplify right side
    557,338.75x = 242,801,067,234.46
  5. Step 5: Solve for x
    x = 242,801,067,234.46/557,338.75
  6. Step 6: Final answer
    x = 435,643.61

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Double scale
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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.