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Finding the Fourth Proportional to 519,418.40, 778,897.20 and 238,791.20

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Solution

The fourth proportional to 519,418.40, 778,897.20 and 238,791.20 is: 358,080.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,418.40 : 778,897.20 = 238,791.20 : x
  2. Step 2: Convert to fraction form
    519,418.40/778,897.20 = 238,791.20/x
  3. Step 3: Cross multiply
    519,418.40x = 778,897.20 × 238,791.20
  4. Step 4: Simplify right side
    519,418.40x = 185,993,797,064.64
  5. Step 5: Solve for x
    x = 185,993,797,064.64/519,418.40
  6. Step 6: Final answer
    x = 358,080.88

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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.