Home / 1,779.21-2,455.47-982.70

Finding the Fourth Proportional to 1,779.21, 2,455.47 and 982.70

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Solution

The fourth proportional to 1,779.21, 2,455.47 and 982.70 is: 1,356.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.21 : 2,455.47 = 982.70 : x
  2. Step 2: Convert to fraction form
    1,779.21/2,455.47 = 982.70/x
  3. Step 3: Cross multiply
    1,779.21x = 2,455.47 × 982.70
  4. Step 4: Simplify right side
    1,779.21x = 2,412,987.30
  5. Step 5: Solve for x
    x = 2,412,987.30/1,779.21
  6. Step 6: Final answer
    x = 1,356.21

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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.