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Finding the Fourth Proportional to 339,991.20, 509,964.93 and 103,335.93

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Solution

The fourth proportional to 339,991.20, 509,964.93 and 103,335.93 is: 154,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,991.20 : 509,964.93 = 103,335.93 : x
  2. Step 2: Convert to fraction form
    339,991.20/509,964.93 = 103,335.93/x
  3. Step 3: Cross multiply
    339,991.20x = 509,964.93 × 103,335.93
  4. Step 4: Simplify right side
    339,991.20x = 52,697,700,308.93
  5. Step 5: Solve for x
    x = 52,697,700,308.93/339,991.20
  6. Step 6: Final answer
    x = 154,997.25

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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.