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Finding the Fourth Proportional to 280,304.39, 420,517.91 and 90,783.92

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Solution

The fourth proportional to 280,304.39, 420,517.91 and 90,783.92 is: 136,195.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,304.39 : 420,517.91 = 90,783.92 : x
  2. Step 2: Convert to fraction form
    280,304.39/420,517.91 = 90,783.92/x
  3. Step 3: Cross multiply
    280,304.39x = 420,517.91 × 90,783.92
  4. Step 4: Simplify right side
    280,304.39x = 38,176,261,743.50
  5. Step 5: Solve for x
    x = 38,176,261,743.50/280,304.39
  6. Step 6: Final answer
    x = 136,195.74

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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.