Home / 3,111.40-4,667.10-802.90

Finding the Fourth Proportional to 3,111.40, 4,667.10 and 802.90

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Solution

The fourth proportional to 3,111.40, 4,667.10 and 802.90 is: 1,204.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.40 : 4,667.10 = 802.90 : x
  2. Step 2: Convert to fraction form
    3,111.40/4,667.10 = 802.90/x
  3. Step 3: Cross multiply
    3,111.40x = 4,667.10 × 802.90
  4. Step 4: Simplify right side
    3,111.40x = 3,747,214.59
  5. Step 5: Solve for x
    x = 3,747,214.59/3,111.40
  6. Step 6: Final answer
    x = 1,204.35

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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.