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Finding the Fourth Proportional to 386,817.72, 580,223.97 and 210,445.73

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Solution

The fourth proportional to 386,817.72, 580,223.97 and 210,445.73 is: 315,667.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,817.72 : 580,223.97 = 210,445.73 : x
  2. Step 2: Convert to fraction form
    386,817.72/580,223.97 = 210,445.73/x
  3. Step 3: Cross multiply
    386,817.72x = 580,223.97 × 210,445.73
  4. Step 4: Simplify right side
    386,817.72x = 122,105,656,930.15
  5. Step 5: Solve for x
    x = 122,105,656,930.15/386,817.72
  6. Step 6: Final answer
    x = 315,667.18

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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.