Home / 3,116.90-4,675.26-808.40

Finding the Fourth Proportional to 3,116.90, 4,675.26 and 808.40

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Solution

The fourth proportional to 3,116.90, 4,675.26 and 808.40 is: 1,212.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.90 : 4,675.26 = 808.40 : x
  2. Step 2: Convert to fraction form
    3,116.90/4,675.26 = 808.40/x
  3. Step 3: Cross multiply
    3,116.90x = 4,675.26 × 808.40
  4. Step 4: Simplify right side
    3,116.90x = 3,779,494.90
  5. Step 5: Solve for x
    x = 3,779,494.90/3,116.90
  6. Step 6: Final answer
    x = 1,212.58

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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.