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Finding the Fourth Proportional to 339,957.90, 509,985.45 and 115,328.70

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Solution

The fourth proportional to 339,957.90, 509,985.45 and 115,328.70 is: 173,009.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,957.90 : 509,985.45 = 115,328.70 : x
  2. Step 2: Convert to fraction form
    339,957.90/509,985.45 = 115,328.70/x
  3. Step 3: Cross multiply
    339,957.90x = 509,985.45 × 115,328.70
  4. Step 4: Simplify right side
    339,957.90x = 58,815,958,967.42
  5. Step 5: Solve for x
    x = 58,815,958,967.42/339,957.90
  6. Step 6: Final answer
    x = 173,009.54

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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.