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Finding the Fourth Proportional to 339,802.85, 509,669.19 and 115,157.47

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Solution

The fourth proportional to 339,802.85, 509,669.19 and 115,157.47 is: 172,724.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,802.85 : 509,669.19 = 115,157.47 : x
  2. Step 2: Convert to fraction form
    339,802.85/509,669.19 = 115,157.47/x
  3. Step 3: Cross multiply
    339,802.85x = 509,669.19 × 115,157.47
  4. Step 4: Simplify right side
    339,802.85x = 58,692,215,248.37
  5. Step 5: Solve for x
    x = 58,692,215,248.37/339,802.85
  6. Step 6: Final answer
    x = 172,724.32

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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.