Home / 1,638.36-2,458.35-1,021.14

Finding the Fourth Proportional to 1,638.36, 2,458.35 and 1,021.14

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Solution

The fourth proportional to 1,638.36, 2,458.35 and 1,021.14 is: 1,532.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.36 : 2,458.35 = 1,021.14 : x
  2. Step 2: Convert to fraction form
    1,638.36/2,458.35 = 1,021.14/x
  3. Step 3: Cross multiply
    1,638.36x = 2,458.35 × 1,021.14
  4. Step 4: Simplify right side
    1,638.36x = 2,510,319.52
  5. Step 5: Solve for x
    x = 2,510,319.52/1,638.36
  6. Step 6: Final answer
    x = 1,532.21

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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.