Home / 1,386.06-2,079.11-412.17

Finding the Fourth Proportional to 1,386.06, 2,079.11 and 412.17

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Solution

The fourth proportional to 1,386.06, 2,079.11 and 412.17 is: 618.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.06 : 2,079.11 = 412.17 : x
  2. Step 2: Convert to fraction form
    1,386.06/2,079.11 = 412.17/x
  3. Step 3: Cross multiply
    1,386.06x = 2,079.11 × 412.17
  4. Step 4: Simplify right side
    1,386.06x = 856,946.77
  5. Step 5: Solve for x
    x = 856,946.77/1,386.06
  6. Step 6: Final answer
    x = 618.26

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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.