Home / 458,121.15-687,449.70-191,859.30

Finding the Fourth Proportional to 458,121.15, 687,449.70 and 191,859.30

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Solution

The fourth proportional to 458,121.15, 687,449.70 and 191,859.30 is: 287,901.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,121.15 : 687,449.70 = 191,859.30 : x
  2. Step 2: Convert to fraction form
    458,121.15/687,449.70 = 191,859.30/x
  3. Step 3: Cross multiply
    458,121.15x = 687,449.70 × 191,859.30
  4. Step 4: Simplify right side
    458,121.15x = 131,893,618,227.21
  5. Step 5: Solve for x
    x = 131,893,618,227.21/458,121.15
  6. Step 6: Final answer
    x = 287,901.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.