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Finding the Fourth Proportional to 509,305.72, 763,958.71 and 189,415.79

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Solution

The fourth proportional to 509,305.72, 763,958.71 and 189,415.79 is: 284,123.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,305.72 : 763,958.71 = 189,415.79 : x
  2. Step 2: Convert to fraction form
    509,305.72/763,958.71 = 189,415.79/x
  3. Step 3: Cross multiply
    509,305.72x = 763,958.71 × 189,415.79
  4. Step 4: Simplify right side
    509,305.72x = 144,705,839,235.78
  5. Step 5: Solve for x
    x = 144,705,839,235.78/509,305.72
  6. Step 6: Final answer
    x = 284,123.73

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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.