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Finding the Fourth Proportional to 343,526.40, 515,289.60 and 203,212.80

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Solution

The fourth proportional to 343,526.40, 515,289.60 and 203,212.80 is: 304,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,526.40 : 515,289.60 = 203,212.80 : x
  2. Step 2: Convert to fraction form
    343,526.40/515,289.60 = 203,212.80/x
  3. Step 3: Cross multiply
    343,526.40x = 515,289.60 × 203,212.80
  4. Step 4: Simplify right side
    343,526.40x = 104,713,442,426.88
  5. Step 5: Solve for x
    x = 104,713,442,426.88/343,526.40
  6. Step 6: Final answer
    x = 304,819.20

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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.