Home / 1,638.35-2,447.10-1,407.91

Finding the Fourth Proportional to 1,638.35, 2,447.10 and 1,407.91

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Solution

The fourth proportional to 1,638.35, 2,447.10 and 1,407.91 is: 2,102.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.35 : 2,447.10 = 1,407.91 : x
  2. Step 2: Convert to fraction form
    1,638.35/2,447.10 = 1,407.91/x
  3. Step 3: Cross multiply
    1,638.35x = 2,447.10 × 1,407.91
  4. Step 4: Simplify right side
    1,638.35x = 3,445,296.56
  5. Step 5: Solve for x
    x = 3,445,296.56/1,638.35
  6. Step 6: Final answer
    x = 2,102.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.