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Finding the Fourth Proportional to 280,371.32, 420,126.26 and 190,296.89

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Solution

The fourth proportional to 280,371.32, 420,126.26 and 190,296.89 is: 285,152.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,371.32 : 420,126.26 = 190,296.89 : x
  2. Step 2: Convert to fraction form
    280,371.32/420,126.26 = 190,296.89/x
  3. Step 3: Cross multiply
    280,371.32x = 420,126.26 × 190,296.89
  4. Step 4: Simplify right side
    280,371.32x = 79,948,717,633.22
  5. Step 5: Solve for x
    x = 79,948,717,633.22/280,371.32
  6. Step 6: Final answer
    x = 285,152.99

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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.