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Finding the Fourth Proportional to 393,954.60, 590,931.90 and 113,500.20

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Solution

The fourth proportional to 393,954.60, 590,931.90 and 113,500.20 is: 170,250.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,954.60 : 590,931.90 = 113,500.20 : x
  2. Step 2: Convert to fraction form
    393,954.60/590,931.90 = 113,500.20/x
  3. Step 3: Cross multiply
    393,954.60x = 590,931.90 × 113,500.20
  4. Step 4: Simplify right side
    393,954.60x = 67,070,888,836.38
  5. Step 5: Solve for x
    x = 67,070,888,836.38/393,954.60
  6. Step 6: Final answer
    x = 170,250.30

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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.