Home / 280,578.40-420,867.60-168,385.30

Finding the Fourth Proportional to 280,578.40, 420,867.60 and 168,385.30

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Solution

The fourth proportional to 280,578.40, 420,867.60 and 168,385.30 is: 252,577.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,578.40 : 420,867.60 = 168,385.30 : x
  2. Step 2: Convert to fraction form
    280,578.40/420,867.60 = 168,385.30/x
  3. Step 3: Cross multiply
    280,578.40x = 420,867.60 × 168,385.30
  4. Step 4: Simplify right side
    280,578.40x = 70,867,917,086.28
  5. Step 5: Solve for x
    x = 70,867,917,086.28/280,578.40
  6. Step 6: Final answer
    x = 252,577.95

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1.5x scale

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.