Home / 1,386.25-2,079.38-474.25

Finding the Fourth Proportional to 1,386.25, 2,079.38 and 474.25

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Solution

The fourth proportional to 1,386.25, 2,079.38 and 474.25 is: 711.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.25 : 2,079.38 = 474.25 : x
  2. Step 2: Convert to fraction form
    1,386.25/2,079.38 = 474.25/x
  3. Step 3: Cross multiply
    1,386.25x = 2,079.38 × 474.25
  4. Step 4: Simplify right side
    1,386.25x = 986,145.97
  5. Step 5: Solve for x
    x = 986,145.97/1,386.25
  6. Step 6: Final answer
    x = 711.38

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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.