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Finding the Fourth Proportional to 393,980.45, 590,121.85 and 266,923.62

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Solution

The fourth proportional to 393,980.45, 590,121.85 and 266,923.62 is: 399,810.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,980.45 : 590,121.85 = 266,923.62 : x
  2. Step 2: Convert to fraction form
    393,980.45/590,121.85 = 266,923.62/x
  3. Step 3: Cross multiply
    393,980.45x = 590,121.85 × 266,923.62
  4. Step 4: Simplify right side
    393,980.45x = 157,517,460,443.10
  5. Step 5: Solve for x
    x = 157,517,460,443.10/393,980.45
  6. Step 6: Final answer
    x = 399,810.35

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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.