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Finding the Fourth Proportional to 386,380.90, 579,571.35 and 105,897.70

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Solution

The fourth proportional to 386,380.90, 579,571.35 and 105,897.70 is: 158,846.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,380.90 : 579,571.35 = 105,897.70 : x
  2. Step 2: Convert to fraction form
    386,380.90/579,571.35 = 105,897.70/x
  3. Step 3: Cross multiply
    386,380.90x = 579,571.35 × 105,897.70
  4. Step 4: Simplify right side
    386,380.90x = 61,375,272,950.90
  5. Step 5: Solve for x
    x = 61,375,272,950.90/386,380.90
  6. Step 6: Final answer
    x = 158,846.55

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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.