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Finding the Fourth Proportional to 561,976.10, 842,672.55 and 206,807.30

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Solution

The fourth proportional to 561,976.10, 842,672.55 and 206,807.30 is: 310,103.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,976.10 : 842,672.55 = 206,807.30 : x
  2. Step 2: Convert to fraction form
    561,976.10/842,672.55 = 206,807.30/x
  3. Step 3: Cross multiply
    561,976.10x = 842,672.55 × 206,807.30
  4. Step 4: Simplify right side
    561,976.10x = 174,270,834,849.62
  5. Step 5: Solve for x
    x = 174,270,834,849.62/561,976.10
  6. Step 6: Final answer
    x = 310,103.64

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.