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Finding the Fourth Proportional to 343,338.60, 515,007.90 and 217,367.40

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Solution

The fourth proportional to 343,338.60, 515,007.90 and 217,367.40 is: 326,051.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,338.60 : 515,007.90 = 217,367.40 : x
  2. Step 2: Convert to fraction form
    343,338.60/515,007.90 = 217,367.40/x
  3. Step 3: Cross multiply
    343,338.60x = 515,007.90 × 217,367.40
  4. Step 4: Simplify right side
    343,338.60x = 111,945,928,202.46
  5. Step 5: Solve for x
    x = 111,945,928,202.46/343,338.60
  6. Step 6: Final answer
    x = 326,051.10

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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.