Home / 1,764.29-2,430.80-1,291.39

Finding the Fourth Proportional to 1,764.29, 2,430.80 and 1,291.39

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Solution

The fourth proportional to 1,764.29, 2,430.80 and 1,291.39 is: 1,779.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.29 : 2,430.80 = 1,291.39 : x
  2. Step 2: Convert to fraction form
    1,764.29/2,430.80 = 1,291.39/x
  3. Step 3: Cross multiply
    1,764.29x = 2,430.80 × 1,291.39
  4. Step 4: Simplify right side
    1,764.29x = 3,139,110.81
  5. Step 5: Solve for x
    x = 3,139,110.81/1,764.29
  6. Step 6: Final answer
    x = 1,779.25

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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.