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Finding the Fourth Proportional to 339,660.40, 509,539.20 and 103,021.60

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Solution

The fourth proportional to 339,660.40, 509,539.20 and 103,021.60 is: 154,547.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,660.40 : 509,539.20 = 103,021.60 : x
  2. Step 2: Convert to fraction form
    339,660.40/509,539.20 = 103,021.60/x
  3. Step 3: Cross multiply
    339,660.40x = 509,539.20 × 103,021.60
  4. Step 4: Simplify right side
    339,660.40x = 52,493,543,646.72
  5. Step 5: Solve for x
    x = 52,493,543,646.72/339,660.40
  6. Step 6: Final answer
    x = 154,547.14

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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.