Home / 1,212.23-1,818.64-346.55

Finding the Fourth Proportional to 1,212.23, 1,818.64 and 346.55

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Solution

The fourth proportional to 1,212.23, 1,818.64 and 346.55 is: 519.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.23 : 1,818.64 = 346.55 : x
  2. Step 2: Convert to fraction form
    1,212.23/1,818.64 = 346.55/x
  3. Step 3: Cross multiply
    1,212.23x = 1,818.64 × 346.55
  4. Step 4: Simplify right side
    1,212.23x = 630,249.69
  5. Step 5: Solve for x
    x = 630,249.69/1,212.23
  6. Step 6: Final answer
    x = 519.91

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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.