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Finding the Fourth Proportional to 280,758.90, 421,092.20 and 100,807.07

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Solution

The fourth proportional to 280,758.90, 421,092.20 and 100,807.07 is: 151,194.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,758.90 : 421,092.20 = 100,807.07 : x
  2. Step 2: Convert to fraction form
    280,758.90/421,092.20 = 100,807.07/x
  3. Step 3: Cross multiply
    280,758.90x = 421,092.20 × 100,807.07
  4. Step 4: Simplify right side
    280,758.90x = 42,449,068,272.36
  5. Step 5: Solve for x
    x = 42,449,068,272.36/280,758.90
  6. Step 6: Final answer
    x = 151,194.03

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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.