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Finding the Fourth Proportional to 817,659.20, 1,226,051.40 and 343,809.20

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Solution

The fourth proportional to 817,659.20, 1,226,051.40 and 343,809.20 is: 515,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,659.20 : 1,226,051.40 = 343,809.20 : x
  2. Step 2: Convert to fraction form
    817,659.20/1,226,051.40 = 343,809.20/x
  3. Step 3: Cross multiply
    817,659.20x = 1,226,051.40 × 343,809.20
  4. Step 4: Simplify right side
    817,659.20x = 421,527,750,992.88
  5. Step 5: Solve for x
    x = 421,527,750,992.88/817,659.20
  6. Step 6: Final answer
    x = 515,529.88

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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.