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Finding the Fourth Proportional to 279,993.08, 386,392.20 and 152,670.80

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Solution

The fourth proportional to 279,993.08, 386,392.20 and 152,670.80 is: 210,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,993.08 : 386,392.20 = 152,670.80 : x
  2. Step 2: Convert to fraction form
    279,993.08/386,392.20 = 152,670.80/x
  3. Step 3: Cross multiply
    279,993.08x = 386,392.20 × 152,670.80
  4. Step 4: Simplify right side
    279,993.08x = 58,990,806,287.76
  5. Step 5: Solve for x
    x = 58,990,806,287.76/279,993.08
  6. Step 6: Final answer
    x = 210,686.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.