Home / 1,386.44-1,909.20-1,239.02

Finding the Fourth Proportional to 1,386.44, 1,909.20 and 1,239.02

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Solution

The fourth proportional to 1,386.44, 1,909.20 and 1,239.02 is: 1,706.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.44 : 1,909.20 = 1,239.02 : x
  2. Step 2: Convert to fraction form
    1,386.44/1,909.20 = 1,239.02/x
  3. Step 3: Cross multiply
    1,386.44x = 1,909.20 × 1,239.02
  4. Step 4: Simplify right side
    1,386.44x = 2,365,536.98
  5. Step 5: Solve for x
    x = 2,365,536.98/1,386.44
  6. Step 6: Final answer
    x = 1,706.19

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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.