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Finding the Fourth Proportional to 1,212.70, 1,818.96 and 346.96

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Solution

The fourth proportional to 1,212.70, 1,818.96 and 346.96 is: 520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.70 : 1,818.96 = 346.96 : x
  2. Step 2: Convert to fraction form
    1,212.70/1,818.96 = 346.96/x
  3. Step 3: Cross multiply
    1,212.70x = 1,818.96 × 346.96
  4. Step 4: Simplify right side
    1,212.70x = 631,106.36
  5. Step 5: Solve for x
    x = 631,106.36/1,212.70
  6. Step 6: Final answer
    x = 520.41

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1.5x scale

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.