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Finding the Fourth Proportional to 479,339.28, 661,727.88 and 298,109.58

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Solution

The fourth proportional to 479,339.28, 661,727.88 and 298,109.58 is: 411,540.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,339.28 : 661,727.88 = 298,109.58 : x
  2. Step 2: Convert to fraction form
    479,339.28/661,727.88 = 298,109.58/x
  3. Step 3: Cross multiply
    479,339.28x = 661,727.88 × 298,109.58
  4. Step 4: Simplify right side
    479,339.28x = 197,267,420,381.09
  5. Step 5: Solve for x
    x = 197,267,420,381.09/479,339.28
  6. Step 6: Final answer
    x = 411,540.28

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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.