Home / 1,987.76-2,739.58-1,758.63

Finding the Fourth Proportional to 1,987.76, 2,739.58 and 1,758.63

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Solution

The fourth proportional to 1,987.76, 2,739.58 and 1,758.63 is: 2,423.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.76 : 2,739.58 = 1,758.63 : x
  2. Step 2: Convert to fraction form
    1,987.76/2,739.58 = 1,758.63/x
  3. Step 3: Cross multiply
    1,987.76x = 2,739.58 × 1,758.63
  4. Step 4: Simplify right side
    1,987.76x = 4,817,907.58
  5. Step 5: Solve for x
    x = 4,817,907.58/1,987.76
  6. Step 6: Final answer
    x = 2,423.79

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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.