Home / 1,431.78-1,975.89-802.26

Finding the Fourth Proportional to 1,431.78, 1,975.89 and 802.26

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Solution

The fourth proportional to 1,431.78, 1,975.89 and 802.26 is: 1,107.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.78 : 1,975.89 = 802.26 : x
  2. Step 2: Convert to fraction form
    1,431.78/1,975.89 = 802.26/x
  3. Step 3: Cross multiply
    1,431.78x = 1,975.89 × 802.26
  4. Step 4: Simplify right side
    1,431.78x = 1,585,177.51
  5. Step 5: Solve for x
    x = 1,585,177.51/1,431.78
  6. Step 6: Final answer
    x = 1,107.14

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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.