Home / 3,111.36-4,666.80-802.80

Finding the Fourth Proportional to 3,111.36, 4,666.80 and 802.80

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Solution

The fourth proportional to 3,111.36, 4,666.80 and 802.80 is: 1,204.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.36 : 4,666.80 = 802.80 : x
  2. Step 2: Convert to fraction form
    3,111.36/4,666.80 = 802.80/x
  3. Step 3: Cross multiply
    3,111.36x = 4,666.80 × 802.80
  4. Step 4: Simplify right side
    3,111.36x = 3,746,507.04
  5. Step 5: Solve for x
    x = 3,746,507.04/3,111.36
  6. Step 6: Final answer
    x = 1,204.14

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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.