Home / 1,213.32-1,818.31-693.57

Finding the Fourth Proportional to 1,213.32, 1,818.31 and 693.57

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Solution

The fourth proportional to 1,213.32, 1,818.31 and 693.57 is: 1,039.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.32 : 1,818.31 = 693.57 : x
  2. Step 2: Convert to fraction form
    1,213.32/1,818.31 = 693.57/x
  3. Step 3: Cross multiply
    1,213.32x = 1,818.31 × 693.57
  4. Step 4: Simplify right side
    1,213.32x = 1,261,125.27
  5. Step 5: Solve for x
    x = 1,261,125.27/1,213.32
  6. Step 6: Final answer
    x = 1,039.40

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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.