Home / 2,157.08-2,976.36-1,317.99

Finding the Fourth Proportional to 2,157.08, 2,976.36 and 1,317.99

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Solution

The fourth proportional to 2,157.08, 2,976.36 and 1,317.99 is: 1,818.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.08 : 2,976.36 = 1,317.99 : x
  2. Step 2: Convert to fraction form
    2,157.08/2,976.36 = 1,317.99/x
  3. Step 3: Cross multiply
    2,157.08x = 2,976.36 × 1,317.99
  4. Step 4: Simplify right side
    2,157.08x = 3,922,809.61
  5. Step 5: Solve for x
    x = 3,922,809.61/2,157.08
  6. Step 6: Final answer
    x = 1,818.57

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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.