Home / 1,991.64-2,987.58-1,558.02

Finding the Fourth Proportional to 1,991.64, 2,987.58 and 1,558.02

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Solution

The fourth proportional to 1,991.64, 2,987.58 and 1,558.02 is: 2,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.64 : 2,987.58 = 1,558.02 : x
  2. Step 2: Convert to fraction form
    1,991.64/2,987.58 = 1,558.02/x
  3. Step 3: Cross multiply
    1,991.64x = 2,987.58 × 1,558.02
  4. Step 4: Simplify right side
    1,991.64x = 4,654,709.39
  5. Step 5: Solve for x
    x = 4,654,709.39/1,991.64
  6. Step 6: Final answer
    x = 2,337.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.