Home / 1,243.09-1,862.20-953.11

Finding the Fourth Proportional to 1,243.09, 1,862.20 and 953.11

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Solution

The fourth proportional to 1,243.09, 1,862.20 and 953.11 is: 1,427.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.09 : 1,862.20 = 953.11 : x
  2. Step 2: Convert to fraction form
    1,243.09/1,862.20 = 953.11/x
  3. Step 3: Cross multiply
    1,243.09x = 1,862.20 × 953.11
  4. Step 4: Simplify right side
    1,243.09x = 1,774,881.44
  5. Step 5: Solve for x
    x = 1,774,881.44/1,243.09
  6. Step 6: Final answer
    x = 1,427.80

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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.