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Finding the Fourth Proportional to 1,212.29, 1,818.39 and 346.60

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Solution

The fourth proportional to 1,212.29, 1,818.39 and 346.60 is: 519.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.29 : 1,818.39 = 346.60 : x
  2. Step 2: Convert to fraction form
    1,212.29/1,818.39 = 346.60/x
  3. Step 3: Cross multiply
    1,212.29x = 1,818.39 × 346.60
  4. Step 4: Simplify right side
    1,212.29x = 630,253.97
  5. Step 5: Solve for x
    x = 630,253.97/1,212.29
  6. Step 6: Final answer
    x = 519.89

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.