Home / 1,212.47-1,818.70-346.78

Finding the Fourth Proportional to 1,212.47, 1,818.70 and 346.78

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Solution

The fourth proportional to 1,212.47, 1,818.70 and 346.78 is: 520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.47 : 1,818.70 = 346.78 : x
  2. Step 2: Convert to fraction form
    1,212.47/1,818.70 = 346.78/x
  3. Step 3: Cross multiply
    1,212.47x = 1,818.70 × 346.78
  4. Step 4: Simplify right side
    1,212.47x = 630,692.14
  5. Step 5: Solve for x
    x = 630,692.14/1,212.47
  6. Step 6: Final answer
    x = 520.17

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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.