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Finding the Fourth Proportional to 339,246.40, 508,869.60 and 206,387.20

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Solution

The fourth proportional to 339,246.40, 508,869.60 and 206,387.20 is: 309,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,246.40 : 508,869.60 = 206,387.20 : x
  2. Step 2: Convert to fraction form
    339,246.40/508,869.60 = 206,387.20/x
  3. Step 3: Cross multiply
    339,246.40x = 508,869.60 × 206,387.20
  4. Step 4: Simplify right side
    339,246.40x = 105,024,171,909.12
  5. Step 5: Solve for x
    x = 105,024,171,909.12/339,246.40
  6. Step 6: Final answer
    x = 309,580.80

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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.