Home / 1,779.06-2,457.29-1,221.38

Finding the Fourth Proportional to 1,779.06, 2,457.29 and 1,221.38

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Solution

The fourth proportional to 1,779.06, 2,457.29 and 1,221.38 is: 1,687.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.06 : 2,457.29 = 1,221.38 : x
  2. Step 2: Convert to fraction form
    1,779.06/2,457.29 = 1,221.38/x
  3. Step 3: Cross multiply
    1,779.06x = 2,457.29 × 1,221.38
  4. Step 4: Simplify right side
    1,779.06x = 3,001,266.47
  5. Step 5: Solve for x
    x = 3,001,266.47/1,779.06
  6. Step 6: Final answer
    x = 1,687.00

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1.5x scale

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.