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Finding the Fourth Proportional to 343,320.40, 515,029.20 and 106,638.40

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Solution

The fourth proportional to 343,320.40, 515,029.20 and 106,638.40 is: 159,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,320.40 : 515,029.20 = 106,638.40 : x
  2. Step 2: Convert to fraction form
    343,320.40/515,029.20 = 106,638.40/x
  3. Step 3: Cross multiply
    343,320.40x = 515,029.20 × 106,638.40
  4. Step 4: Simplify right side
    343,320.40x = 54,921,889,841.28
  5. Step 5: Solve for x
    x = 54,921,889,841.28/343,320.40
  6. Step 6: Final answer
    x = 159,972.70

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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.