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Finding the Fourth Proportional to 320,388.60, 480,655.80 and 187,200.30

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Solution

The fourth proportional to 320,388.60, 480,655.80 and 187,200.30 is: 280,843.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,388.60 : 480,655.80 = 187,200.30 : x
  2. Step 2: Convert to fraction form
    320,388.60/480,655.80 = 187,200.30/x
  3. Step 3: Cross multiply
    320,388.60x = 480,655.80 × 187,200.30
  4. Step 4: Simplify right side
    320,388.60x = 89,978,909,956.74
  5. Step 5: Solve for x
    x = 89,978,909,956.74/320,388.60
  6. Step 6: Final answer
    x = 280,843.04

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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.