Home / 2,157-2,976.94-1,317.53

Finding the Fourth Proportional to 2,157, 2,976.94 and 1,317.53

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Solution

The fourth proportional to 2,157, 2,976.94 and 1,317.53 is: 1,818.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157 : 2,976.94 = 1,317.53 : x
  2. Step 2: Convert to fraction form
    2,157/2,976.94 = 1,317.53/x
  3. Step 3: Cross multiply
    2,157x = 2,976.94 × 1,317.53
  4. Step 4: Simplify right side
    2,157x = 3,922,186.29
  5. Step 5: Solve for x
    x = 3,922,186.29/2,157
  6. Step 6: Final answer
    x = 1,818.35

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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.