Home / 1,261.09-1,888.43-1,055.15

Finding the Fourth Proportional to 1,261.09, 1,888.43 and 1,055.15

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Solution

The fourth proportional to 1,261.09, 1,888.43 and 1,055.15 is: 1,580.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.09 : 1,888.43 = 1,055.15 : x
  2. Step 2: Convert to fraction form
    1,261.09/1,888.43 = 1,055.15/x
  3. Step 3: Cross multiply
    1,261.09x = 1,888.43 × 1,055.15
  4. Step 4: Simplify right side
    1,261.09x = 1,992,569.28
  5. Step 5: Solve for x
    x = 1,992,569.28/1,261.09
  6. Step 6: Final answer
    x = 1,580.04

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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.