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Finding the Fourth Proportional to 2,265.84, 3,126.80 and 1,603.80

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Solution

The fourth proportional to 2,265.84, 3,126.80 and 1,603.80 is: 2,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,265.84 : 3,126.80 = 1,603.80 : x
  2. Step 2: Convert to fraction form
    2,265.84/3,126.80 = 1,603.80/x
  3. Step 3: Cross multiply
    2,265.84x = 3,126.80 × 1,603.80
  4. Step 4: Simplify right side
    2,265.84x = 5,014,765.85
  5. Step 5: Solve for x
    x = 5,014,765.85/2,265.84
  6. Step 6: Final answer
    x = 2,213.20

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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.