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Finding the Fourth Proportional to 339,938.20, 509,980.20 and 103,304.80

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Solution

The fourth proportional to 339,938.20, 509,980.20 and 103,304.80 is: 154,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,938.20 : 509,980.20 = 103,304.80 : x
  2. Step 2: Convert to fraction form
    339,938.20/509,980.20 = 103,304.80/x
  3. Step 3: Cross multiply
    339,938.20x = 509,980.20 × 103,304.80
  4. Step 4: Simplify right side
    339,938.20x = 52,683,402,564.96
  5. Step 5: Solve for x
    x = 52,683,402,564.96/339,938.20
  6. Step 6: Final answer
    x = 154,979.35

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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.