Home / 1,911.73-2,638.15-1,125.63

Finding the Fourth Proportional to 1,911.73, 2,638.15 and 1,125.63

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Solution

The fourth proportional to 1,911.73, 2,638.15 and 1,125.63 is: 1,553.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.73 : 2,638.15 = 1,125.63 : x
  2. Step 2: Convert to fraction form
    1,911.73/2,638.15 = 1,125.63/x
  3. Step 3: Cross multiply
    1,911.73x = 2,638.15 × 1,125.63
  4. Step 4: Simplify right side
    1,911.73x = 2,969,580.78
  5. Step 5: Solve for x
    x = 2,969,580.78/1,911.73
  6. Step 6: Final answer
    x = 1,553.35

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1.5x scale

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.