Home / 479,191.20-661,496.40-309,508.08

Finding the Fourth Proportional to 479,191.20, 661,496.40 and 309,508.08

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Solution

The fourth proportional to 479,191.20, 661,496.40 and 309,508.08 is: 427,258.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,191.20 : 661,496.40 = 309,508.08 : x
  2. Step 2: Convert to fraction form
    479,191.20/661,496.40 = 309,508.08/x
  3. Step 3: Cross multiply
    479,191.20x = 661,496.40 × 309,508.08
  4. Step 4: Simplify right side
    479,191.20x = 204,738,480,690.91
  5. Step 5: Solve for x
    x = 204,738,480,690.91/479,191.20
  6. Step 6: Final answer
    x = 427,258.43

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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.