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Finding the Fourth Proportional to 314,930.60, 472,395.90 and 213,891.20

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Solution

The fourth proportional to 314,930.60, 472,395.90 and 213,891.20 is: 320,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,930.60 : 472,395.90 = 213,891.20 : x
  2. Step 2: Convert to fraction form
    314,930.60/472,395.90 = 213,891.20/x
  3. Step 3: Cross multiply
    314,930.60x = 472,395.90 × 213,891.20
  4. Step 4: Simplify right side
    314,930.60x = 101,041,325,926.08
  5. Step 5: Solve for x
    x = 101,041,325,926.08/314,930.60
  6. Step 6: Final answer
    x = 320,836.80

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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.