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Finding the Fourth Proportional to 343,322.40, 515,032.20 and 106,640.40

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Solution

The fourth proportional to 343,322.40, 515,032.20 and 106,640.40 is: 159,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,322.40 : 515,032.20 = 106,640.40 : x
  2. Step 2: Convert to fraction form
    343,322.40/515,032.20 = 106,640.40/x
  3. Step 3: Cross multiply
    343,322.40x = 515,032.20 × 106,640.40
  4. Step 4: Simplify right side
    343,322.40x = 54,923,239,820.88
  5. Step 5: Solve for x
    x = 54,923,239,820.88/343,322.40
  6. Step 6: Final answer
    x = 159,975.70

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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.