Home / 1,212.40-1,818.52-346.80

Finding the Fourth Proportional to 1,212.40, 1,818.52 and 346.80

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Solution

The fourth proportional to 1,212.40, 1,818.52 and 346.80 is: 520.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.40 : 1,818.52 = 346.80 : x
  2. Step 2: Convert to fraction form
    1,212.40/1,818.52 = 346.80/x
  3. Step 3: Cross multiply
    1,212.40x = 1,818.52 × 346.80
  4. Step 4: Simplify right side
    1,212.40x = 630,662.74
  5. Step 5: Solve for x
    x = 630,662.74/1,212.40
  6. Step 6: Final answer
    x = 520.18

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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.