Home / 1,215.86-1,824.58-668.42

Finding the Fourth Proportional to 1,215.86, 1,824.58 and 668.42

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Solution

The fourth proportional to 1,215.86, 1,824.58 and 668.42 is: 1,003.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.86 : 1,824.58 = 668.42 : x
  2. Step 2: Convert to fraction form
    1,215.86/1,824.58 = 668.42/x
  3. Step 3: Cross multiply
    1,215.86x = 1,824.58 × 668.42
  4. Step 4: Simplify right side
    1,215.86x = 1,219,585.76
  5. Step 5: Solve for x
    x = 1,219,585.76/1,215.86
  6. Step 6: Final answer
    x = 1,003.06

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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.