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Finding the Fourth Proportional to 814,661.20, 1,222,429.20 and 341,394.40

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Solution

The fourth proportional to 814,661.20, 1,222,429.20 and 341,394.40 is: 512,274.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,661.20 : 1,222,429.20 = 341,394.40 : x
  2. Step 2: Convert to fraction form
    814,661.20/1,222,429.20 = 341,394.40/x
  3. Step 3: Cross multiply
    814,661.20x = 1,222,429.20 × 341,394.40
  4. Step 4: Simplify right side
    814,661.20x = 417,330,483,276.48
  5. Step 5: Solve for x
    x = 417,330,483,276.48/814,661.20
  6. Step 6: Final answer
    x = 512,274.90

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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.