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Finding the Fourth Proportional to 393,610.80, 590,416.20 and 314,878.80

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Solution

The fourth proportional to 393,610.80, 590,416.20 and 314,878.80 is: 472,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,610.80 : 590,416.20 = 314,878.80 : x
  2. Step 2: Convert to fraction form
    393,610.80/590,416.20 = 314,878.80/x
  3. Step 3: Cross multiply
    393,610.80x = 590,416.20 × 314,878.80
  4. Step 4: Simplify right side
    393,610.80x = 185,909,544,556.56
  5. Step 5: Solve for x
    x = 185,909,544,556.56/393,610.80
  6. Step 6: Final answer
    x = 472,318.20

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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.