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Finding the Fourth Proportional to 680,879.80, 1,021,416.90 and 231,621.40

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Solution

The fourth proportional to 680,879.80, 1,021,416.90 and 231,621.40 is: 347,465.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,879.80 : 1,021,416.90 = 231,621.40 : x
  2. Step 2: Convert to fraction form
    680,879.80/1,021,416.90 = 231,621.40/x
  3. Step 3: Cross multiply
    680,879.80x = 1,021,416.90 × 231,621.40
  4. Step 4: Simplify right side
    680,879.80x = 236,582,012,361.66
  5. Step 5: Solve for x
    x = 236,582,012,361.66/680,879.80
  6. Step 6: Final answer
    x = 347,465.17

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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.