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Finding the Fourth Proportional to 557,194.72, 769,103.76 and 355,990.24

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Solution

The fourth proportional to 557,194.72, 769,103.76 and 355,990.24 is: 491,378.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,194.72 : 769,103.76 = 355,990.24 : x
  2. Step 2: Convert to fraction form
    557,194.72/769,103.76 = 355,990.24/x
  3. Step 3: Cross multiply
    557,194.72x = 769,103.76 × 355,990.24
  4. Step 4: Simplify right side
    557,194.72x = 273,793,432,107.30
  5. Step 5: Solve for x
    x = 273,793,432,107.30/557,194.72
  6. Step 6: Final answer
    x = 491,378.37

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Double scale
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Similar ratio
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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.