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Finding the Fourth Proportional to 343,904.20, 515,929.20 and 103,998.40

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Solution

The fourth proportional to 343,904.20, 515,929.20 and 103,998.40 is: 156,019.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,904.20 : 515,929.20 = 103,998.40 : x
  2. Step 2: Convert to fraction form
    343,904.20/515,929.20 = 103,998.40/x
  3. Step 3: Cross multiply
    343,904.20x = 515,929.20 × 103,998.40
  4. Step 4: Simplify right side
    343,904.20x = 53,655,811,313.28
  5. Step 5: Solve for x
    x = 53,655,811,313.28/343,904.20
  6. Step 6: Final answer
    x = 156,019.65

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1.5x scale

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.