Home / 1,418.18-1,957.30-1,021.15

Finding the Fourth Proportional to 1,418.18, 1,957.30 and 1,021.15

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Solution

The fourth proportional to 1,418.18, 1,957.30 and 1,021.15 is: 1,409.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.18 : 1,957.30 = 1,021.15 : x
  2. Step 2: Convert to fraction form
    1,418.18/1,957.30 = 1,021.15/x
  3. Step 3: Cross multiply
    1,418.18x = 1,957.30 × 1,021.15
  4. Step 4: Simplify right side
    1,418.18x = 1,998,696.68
  5. Step 5: Solve for x
    x = 1,998,696.68/1,418.18
  6. Step 6: Final answer
    x = 1,409.34

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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.