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Finding the Fourth Proportional to 339,870.56, 509,772.74 and 103,215.29

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Solution

The fourth proportional to 339,870.56, 509,772.74 and 103,215.29 is: 154,812.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,870.56 : 509,772.74 = 103,215.29 : x
  2. Step 2: Convert to fraction form
    339,870.56/509,772.74 = 103,215.29/x
  3. Step 3: Cross multiply
    339,870.56x = 509,772.74 × 103,215.29
  4. Step 4: Simplify right side
    339,870.56x = 52,616,338,128.25
  5. Step 5: Solve for x
    x = 52,616,338,128.25/339,870.56
  6. Step 6: Final answer
    x = 154,812.88

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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.