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Finding the Fourth Proportional to 280,551.30, 420,886.13 and 90,996.94

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Solution

The fourth proportional to 280,551.30, 420,886.13 and 90,996.94 is: 136,514.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,551.30 : 420,886.13 = 90,996.94 : x
  2. Step 2: Convert to fraction form
    280,551.30/420,886.13 = 90,996.94/x
  3. Step 3: Cross multiply
    280,551.30x = 420,886.13 × 90,996.94
  4. Step 4: Simplify right side
    280,551.30x = 38,299,349,918.44
  5. Step 5: Solve for x
    x = 38,299,349,918.44/280,551.30
  6. Step 6: Final answer
    x = 136,514.61

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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.