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Finding the Fourth Proportional to 518,231.13, 715,181.16 and 288,788.73

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Solution

The fourth proportional to 518,231.13, 715,181.16 and 288,788.73 is: 398,540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,231.13 : 715,181.16 = 288,788.73 : x
  2. Step 2: Convert to fraction form
    518,231.13/715,181.16 = 288,788.73/x
  3. Step 3: Cross multiply
    518,231.13x = 715,181.16 × 288,788.73
  4. Step 4: Simplify right side
    518,231.13x = 206,536,258,916.33
  5. Step 5: Solve for x
    x = 206,536,258,916.33/518,231.13
  6. Step 6: Final answer
    x = 398,540.82

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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.