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Finding the Fourth Proportional to 280,523.40, 420,930.90 and 122,767.80

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Solution

The fourth proportional to 280,523.40, 420,930.90 and 122,767.80 is: 184,215.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,523.40 : 420,930.90 = 122,767.80 : x
  2. Step 2: Convert to fraction form
    280,523.40/420,930.90 = 122,767.80/x
  3. Step 3: Cross multiply
    280,523.40x = 420,930.90 × 122,767.80
  4. Step 4: Simplify right side
    280,523.40x = 51,676,760,545.02
  5. Step 5: Solve for x
    x = 51,676,760,545.02/280,523.40
  6. Step 6: Final answer
    x = 184,215.51

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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.