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Finding the Fourth Proportional to 387,336.50, 580,874.10 and 147,393.44

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Solution

The fourth proportional to 387,336.50, 580,874.10 and 147,393.44 is: 221,040.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,336.50 : 580,874.10 = 147,393.44 : x
  2. Step 2: Convert to fraction form
    387,336.50/580,874.10 = 147,393.44/x
  3. Step 3: Cross multiply
    387,336.50x = 580,874.10 × 147,393.44
  4. Step 4: Simplify right side
    387,336.50x = 85,617,031,805.90
  5. Step 5: Solve for x
    x = 85,617,031,805.90/387,336.50
  6. Step 6: Final answer
    x = 221,040.44

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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.