Home / 1,985.84-2,741.64-1,288.52

Finding the Fourth Proportional to 1,985.84, 2,741.64 and 1,288.52

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Solution

The fourth proportional to 1,985.84, 2,741.64 and 1,288.52 is: 1,778.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.84 : 2,741.64 = 1,288.52 : x
  2. Step 2: Convert to fraction form
    1,985.84/2,741.64 = 1,288.52/x
  3. Step 3: Cross multiply
    1,985.84x = 2,741.64 × 1,288.52
  4. Step 4: Simplify right side
    1,985.84x = 3,532,657.97
  5. Step 5: Solve for x
    x = 3,532,657.97/1,985.84
  6. Step 6: Final answer
    x = 1,778.92

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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.