Home / 1,214.83-1,678.53-1,183.72

Finding the Fourth Proportional to 1,214.83, 1,678.53 and 1,183.72

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Solution

The fourth proportional to 1,214.83, 1,678.53 and 1,183.72 is: 1,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.83 : 1,678.53 = 1,183.72 : x
  2. Step 2: Convert to fraction form
    1,214.83/1,678.53 = 1,183.72/x
  3. Step 3: Cross multiply
    1,214.83x = 1,678.53 × 1,183.72
  4. Step 4: Simplify right side
    1,214.83x = 1,986,909.53
  5. Step 5: Solve for x
    x = 1,986,909.53/1,214.83
  6. Step 6: Final answer
    x = 1,635.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.