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Finding the Fourth Proportional to 343,708.20, 515,355.21 and 154,134.32

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Solution

The fourth proportional to 343,708.20, 515,355.21 and 154,134.32 is: 231,108.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,708.20 : 515,355.21 = 154,134.32 : x
  2. Step 2: Convert to fraction form
    343,708.20/515,355.21 = 154,134.32/x
  3. Step 3: Cross multiply
    343,708.20x = 515,355.21 × 154,134.32
  4. Step 4: Simplify right side
    343,708.20x = 79,433,922,275.03
  5. Step 5: Solve for x
    x = 79,433,922,275.03/343,708.20
  6. Step 6: Final answer
    x = 231,108.60

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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.