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Finding the Fourth Proportional to 339,478.40, 508,780.20 and 245,874.80

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Solution

The fourth proportional to 339,478.40, 508,780.20 and 245,874.80 is: 368,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,478.40 : 508,780.20 = 245,874.80 : x
  2. Step 2: Convert to fraction form
    339,478.40/508,780.20 = 245,874.80/x
  3. Step 3: Cross multiply
    339,478.40x = 508,780.20 × 245,874.80
  4. Step 4: Simplify right side
    339,478.40x = 125,096,229,918.96
  5. Step 5: Solve for x
    x = 125,096,229,918.96/339,478.40
  6. Step 6: Final answer
    x = 368,495.40

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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.