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Finding the Fourth Proportional to 479,338.12, 661,726.30 and 298,108.42

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Solution

The fourth proportional to 479,338.12, 661,726.30 and 298,108.42 is: 411,538.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,338.12 : 661,726.30 = 298,108.42 : x
  2. Step 2: Convert to fraction form
    479,338.12/661,726.30 = 298,108.42/x
  3. Step 3: Cross multiply
    479,338.12x = 661,726.30 × 298,108.42
  4. Step 4: Simplify right side
    479,338.12x = 197,266,181,765.45
  5. Step 5: Solve for x
    x = 197,266,181,765.45/479,338.12
  6. Step 6: Final answer
    x = 411,538.69

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1.5x scale

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.