Home / 1,911.74-2,638.15-1,072.42

Finding the Fourth Proportional to 1,911.74, 2,638.15 and 1,072.42

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Solution

The fourth proportional to 1,911.74, 2,638.15 and 1,072.42 is: 1,479.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.74 : 2,638.15 = 1,072.42 : x
  2. Step 2: Convert to fraction form
    1,911.74/2,638.15 = 1,072.42/x
  3. Step 3: Cross multiply
    1,911.74x = 2,638.15 × 1,072.42
  4. Step 4: Simplify right side
    1,911.74x = 2,829,207.50
  5. Step 5: Solve for x
    x = 2,829,207.50/1,911.74
  6. Step 6: Final answer
    x = 1,479.92

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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.