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Finding the Fourth Proportional to 320,422.60, 480,706.80 and 187,234.30

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Solution

The fourth proportional to 320,422.60, 480,706.80 and 187,234.30 is: 280,894.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,422.60 : 480,706.80 = 187,234.30 : x
  2. Step 2: Convert to fraction form
    320,422.60/480,706.80 = 187,234.30/x
  3. Step 3: Cross multiply
    320,422.60x = 480,706.80 × 187,234.30
  4. Step 4: Simplify right side
    320,422.60x = 90,004,801,203.24
  5. Step 5: Solve for x
    x = 90,004,801,203.24/320,422.60
  6. Step 6: Final answer
    x = 280,894.05

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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.