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Finding the Fourth Proportional to 340,686.65, 511,104.78 and 100,781.77

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Solution

The fourth proportional to 340,686.65, 511,104.78 and 100,781.77 is: 151,194.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,686.65 : 511,104.78 = 100,781.77 : x
  2. Step 2: Convert to fraction form
    340,686.65/511,104.78 = 100,781.77/x
  3. Step 3: Cross multiply
    340,686.65x = 511,104.78 × 100,781.77
  4. Step 4: Simplify right side
    340,686.65x = 51,510,043,879.95
  5. Step 5: Solve for x
    x = 51,510,043,879.95/340,686.65
  6. Step 6: Final answer
    x = 151,194.78

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1.5x scale

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.