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Finding the Fourth Proportional to 679,502.70, 1,019,910.15 and 413,782.20

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Solution

The fourth proportional to 679,502.70, 1,019,910.15 and 413,782.20 is: 621,072.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,502.70 : 1,019,910.15 = 413,782.20 : x
  2. Step 2: Convert to fraction form
    679,502.70/1,019,910.15 = 413,782.20/x
  3. Step 3: Cross multiply
    679,502.70x = 1,019,910.15 × 413,782.20
  4. Step 4: Simplify right side
    679,502.70x = 422,020,665,669.33
  5. Step 5: Solve for x
    x = 422,020,665,669.33/679,502.70
  6. Step 6: Final answer
    x = 621,072.83

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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.