Home / 1,985.72-2,738.94-1,157.72

Finding the Fourth Proportional to 1,985.72, 2,738.94 and 1,157.72

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Solution

The fourth proportional to 1,985.72, 2,738.94 and 1,157.72 is: 1,596.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.72 : 2,738.94 = 1,157.72 : x
  2. Step 2: Convert to fraction form
    1,985.72/2,738.94 = 1,157.72/x
  3. Step 3: Cross multiply
    1,985.72x = 2,738.94 × 1,157.72
  4. Step 4: Simplify right side
    1,985.72x = 3,170,925.62
  5. Step 5: Solve for x
    x = 3,170,925.62/1,985.72
  6. Step 6: Final answer
    x = 1,596.86

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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.