Home / 1,391.36-1,918.48-1,041.44

Finding the Fourth Proportional to 1,391.36, 1,918.48 and 1,041.44

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Solution

The fourth proportional to 1,391.36, 1,918.48 and 1,041.44 is: 1,435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.36 : 1,918.48 = 1,041.44 : x
  2. Step 2: Convert to fraction form
    1,391.36/1,918.48 = 1,041.44/x
  3. Step 3: Cross multiply
    1,391.36x = 1,918.48 × 1,041.44
  4. Step 4: Simplify right side
    1,391.36x = 1,997,981.81
  5. Step 5: Solve for x
    x = 1,997,981.81/1,391.36
  6. Step 6: Final answer
    x = 1,435.99

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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.