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Finding the Fourth Proportional to 280,415.25, 386,862.30 and 172,797.84

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Solution

The fourth proportional to 280,415.25, 386,862.30 and 172,797.84 is: 238,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,415.25 : 386,862.30 = 172,797.84 : x
  2. Step 2: Convert to fraction form
    280,415.25/386,862.30 = 172,797.84/x
  3. Step 3: Cross multiply
    280,415.25x = 386,862.30 × 172,797.84
  4. Step 4: Simplify right side
    280,415.25x = 66,848,969,817.43
  5. Step 5: Solve for x
    x = 66,848,969,817.43/280,415.25
  6. Step 6: Final answer
    x = 238,392.78

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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.