Home / 2,156.99-2,975.93-1,317.39

Finding the Fourth Proportional to 2,156.99, 2,975.93 and 1,317.39

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Solution

The fourth proportional to 2,156.99, 2,975.93 and 1,317.39 is: 1,817.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.99 : 2,975.93 = 1,317.39 : x
  2. Step 2: Convert to fraction form
    2,156.99/2,975.93 = 1,317.39/x
  3. Step 3: Cross multiply
    2,156.99x = 2,975.93 × 1,317.39
  4. Step 4: Simplify right side
    2,156.99x = 3,920,460.42
  5. Step 5: Solve for x
    x = 3,920,460.42/2,156.99
  6. Step 6: Final answer
    x = 1,817.56

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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.