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Finding the Fourth Proportional to 339,999.20, 509,976.93 and 103,343.93

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Solution

The fourth proportional to 339,999.20, 509,976.93 and 103,343.93 is: 155,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,999.20 : 509,976.93 = 103,343.93 : x
  2. Step 2: Convert to fraction form
    339,999.20/509,976.93 = 103,343.93/x
  3. Step 3: Cross multiply
    339,999.20x = 509,976.93 × 103,343.93
  4. Step 4: Simplify right side
    339,999.20x = 52,703,020,155.53
  5. Step 5: Solve for x
    x = 52,703,020,155.53/339,999.20
  6. Step 6: Final answer
    x = 155,009.25

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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.