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Finding the Fourth Proportional to 587,608.12, 811,147.02 and 396,879.88

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Solution

The fourth proportional to 587,608.12, 811,147.02 and 396,879.88 is: 547,861.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,608.12 : 811,147.02 = 396,879.88 : x
  2. Step 2: Convert to fraction form
    587,608.12/811,147.02 = 396,879.88/x
  3. Step 3: Cross multiply
    587,608.12x = 811,147.02 × 396,879.88
  4. Step 4: Simplify right side
    587,608.12x = 321,927,931,959.96
  5. Step 5: Solve for x
    x = 321,927,931,959.96/587,608.12
  6. Step 6: Final answer
    x = 547,861.61

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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.