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Finding the Fourth Proportional to 287,878.30, 397,291.49 and 167,019.61

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Solution

The fourth proportional to 287,878.30, 397,291.49 and 167,019.61 is: 230,498.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,878.30 : 397,291.49 = 167,019.61 : x
  2. Step 2: Convert to fraction form
    287,878.30/397,291.49 = 167,019.61/x
  3. Step 3: Cross multiply
    287,878.30x = 397,291.49 × 167,019.61
  4. Step 4: Simplify right side
    287,878.30x = 66,355,469,716.12
  5. Step 5: Solve for x
    x = 66,355,469,716.12/287,878.30
  6. Step 6: Final answer
    x = 230,498.34

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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.