Home / 1,368.35-2,039.53-1,290.51

Finding the Fourth Proportional to 1,368.35, 2,039.53 and 1,290.51

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Solution

The fourth proportional to 1,368.35, 2,039.53 and 1,290.51 is: 1,923.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.35 : 2,039.53 = 1,290.51 : x
  2. Step 2: Convert to fraction form
    1,368.35/2,039.53 = 1,290.51/x
  3. Step 3: Cross multiply
    1,368.35x = 2,039.53 × 1,290.51
  4. Step 4: Simplify right side
    1,368.35x = 2,632,038.28
  5. Step 5: Solve for x
    x = 2,632,038.28/1,368.35
  6. Step 6: Final answer
    x = 1,923.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.