Home / 1,955.20-2,699.28-1,291.84

Finding the Fourth Proportional to 1,955.20, 2,699.28 and 1,291.84

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Solution

The fourth proportional to 1,955.20, 2,699.28 and 1,291.84 is: 1,783.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.20 : 2,699.28 = 1,291.84 : x
  2. Step 2: Convert to fraction form
    1,955.20/2,699.28 = 1,291.84/x
  3. Step 3: Cross multiply
    1,955.20x = 2,699.28 × 1,291.84
  4. Step 4: Simplify right side
    1,955.20x = 3,487,037.88
  5. Step 5: Solve for x
    x = 3,487,037.88/1,955.20
  6. Step 6: Final answer
    x = 1,783.47

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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.