Home / 3,111.25-4,667.15-802.75

Finding the Fourth Proportional to 3,111.25, 4,667.15 and 802.75

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Solution

The fourth proportional to 3,111.25, 4,667.15 and 802.75 is: 1,204.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.25 : 4,667.15 = 802.75 : x
  2. Step 2: Convert to fraction form
    3,111.25/4,667.15 = 802.75/x
  3. Step 3: Cross multiply
    3,111.25x = 4,667.15 × 802.75
  4. Step 4: Simplify right side
    3,111.25x = 3,746,554.66
  5. Step 5: Solve for x
    x = 3,746,554.66/3,111.25
  6. Step 6: Final answer
    x = 1,204.20

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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.