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Finding the Fourth Proportional to 615,805.20, 923,578.20 and 260,830.80

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Solution

The fourth proportional to 615,805.20, 923,578.20 and 260,830.80 is: 391,191.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,805.20 : 923,578.20 = 260,830.80 : x
  2. Step 2: Convert to fraction form
    615,805.20/923,578.20 = 260,830.80/x
  3. Step 3: Cross multiply
    615,805.20x = 923,578.20 × 260,830.80
  4. Step 4: Simplify right side
    615,805.20x = 240,897,640,768.56
  5. Step 5: Solve for x
    x = 240,897,640,768.56/615,805.20
  6. Step 6: Final answer
    x = 391,191.31

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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.