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Finding the Fourth Proportional to 255,090.20, 382,635.30 and 239,343.80

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Solution

The fourth proportional to 255,090.20, 382,635.30 and 239,343.80 is: 359,015.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,090.20 : 382,635.30 = 239,343.80 : x
  2. Step 2: Convert to fraction form
    255,090.20/382,635.30 = 239,343.80/x
  3. Step 3: Cross multiply
    255,090.20x = 382,635.30 × 239,343.80
  4. Step 4: Simplify right side
    255,090.20x = 91,581,386,716.14
  5. Step 5: Solve for x
    x = 91,581,386,716.14/255,090.20
  6. Step 6: Final answer
    x = 359,015.70

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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.