Home / 1,386.09-1,908.59-1,297.95

Finding the Fourth Proportional to 1,386.09, 1,908.59 and 1,297.95

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Solution

The fourth proportional to 1,386.09, 1,908.59 and 1,297.95 is: 1,787.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.09 : 1,908.59 = 1,297.95 : x
  2. Step 2: Convert to fraction form
    1,386.09/1,908.59 = 1,297.95/x
  3. Step 3: Cross multiply
    1,386.09x = 1,908.59 × 1,297.95
  4. Step 4: Simplify right side
    1,386.09x = 2,477,247.90
  5. Step 5: Solve for x
    x = 2,477,247.90/1,386.09
  6. Step 6: Final answer
    x = 1,787.22

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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.