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Finding the Fourth Proportional to 393,639.40, 590,055.90 and 193,652.20

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Solution

The fourth proportional to 393,639.40, 590,055.90 and 193,652.20 is: 290,279.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,639.40 : 590,055.90 = 193,652.20 : x
  2. Step 2: Convert to fraction form
    393,639.40/590,055.90 = 193,652.20/x
  3. Step 3: Cross multiply
    393,639.40x = 590,055.90 × 193,652.20
  4. Step 4: Simplify right side
    393,639.40x = 114,265,623,157.98
  5. Step 5: Solve for x
    x = 114,265,623,157.98/393,639.40
  6. Step 6: Final answer
    x = 290,279.94

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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.