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Finding the Fourth Proportional to 386,239.86, 579,360.27 and 105,759.54

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Solution

The fourth proportional to 386,239.86, 579,360.27 and 105,759.54 is: 158,639.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,239.86 : 579,360.27 = 105,759.54 : x
  2. Step 2: Convert to fraction form
    386,239.86/579,360.27 = 105,759.54/x
  3. Step 3: Cross multiply
    386,239.86x = 579,360.27 × 105,759.54
  4. Step 4: Simplify right side
    386,239.86x = 61,272,875,649.48
  5. Step 5: Solve for x
    x = 61,272,875,649.48/386,239.86
  6. Step 6: Final answer
    x = 158,639.44

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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.