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Finding the Fourth Proportional to 343,904.70, 515,929.95 and 103,998.90

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Solution

The fourth proportional to 343,904.70, 515,929.95 and 103,998.90 is: 156,020.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,904.70 : 515,929.95 = 103,998.90 : x
  2. Step 2: Convert to fraction form
    343,904.70/515,929.95 = 103,998.90/x
  3. Step 3: Cross multiply
    343,904.70x = 515,929.95 × 103,998.90
  4. Step 4: Simplify right side
    343,904.70x = 53,656,147,277.06
  5. Step 5: Solve for x
    x = 53,656,147,277.06/343,904.70
  6. Step 6: Final answer
    x = 156,020.40

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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.