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Finding the Fourth Proportional to 280,551.80, 420,886.88 and 90,997.44

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Solution

The fourth proportional to 280,551.80, 420,886.88 and 90,997.44 is: 136,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,551.80 : 420,886.88 = 90,997.44 : x
  2. Step 2: Convert to fraction form
    280,551.80/420,886.88 = 90,997.44/x
  3. Step 3: Cross multiply
    280,551.80x = 420,886.88 × 90,997.44
  4. Step 4: Simplify right side
    280,551.80x = 38,299,628,609.59
  5. Step 5: Solve for x
    x = 38,299,628,609.59/280,551.80
  6. Step 6: Final answer
    x = 136,515.36

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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.