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Finding the Fourth Proportional to 320,412.60, 480,691.80 and 187,224.30

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Solution

The fourth proportional to 320,412.60, 480,691.80 and 187,224.30 is: 280,879.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,412.60 : 480,691.80 = 187,224.30 : x
  2. Step 2: Convert to fraction form
    320,412.60/480,691.80 = 187,224.30/x
  3. Step 3: Cross multiply
    320,412.60x = 480,691.80 × 187,224.30
  4. Step 4: Simplify right side
    320,412.60x = 89,997,185,770.74
  5. Step 5: Solve for x
    x = 89,997,185,770.74/320,412.60
  6. Step 6: Final answer
    x = 280,879.05

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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.