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Finding the Fourth Proportional to 386,334.80, 579,623.70 and 186,661.70

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Solution

The fourth proportional to 386,334.80, 579,623.70 and 186,661.70 is: 280,051.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,334.80 : 579,623.70 = 186,661.70 : x
  2. Step 2: Convert to fraction form
    386,334.80/579,623.70 = 186,661.70/x
  3. Step 3: Cross multiply
    386,334.80x = 579,623.70 × 186,661.70
  4. Step 4: Simplify right side
    386,334.80x = 108,193,545,202.29
  5. Step 5: Solve for x
    x = 108,193,545,202.29/386,334.80
  6. Step 6: Final answer
    x = 280,051.25

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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.