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Finding the Fourth Proportional to 2,603.55, 3,905.26 and 1,216.12

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Solution

The fourth proportional to 2,603.55, 3,905.26 and 1,216.12 is: 1,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,603.55 : 3,905.26 = 1,216.12 : x
  2. Step 2: Convert to fraction form
    2,603.55/3,905.26 = 1,216.12/x
  3. Step 3: Cross multiply
    2,603.55x = 3,905.26 × 1,216.12
  4. Step 4: Simplify right side
    2,603.55x = 4,749,258.71
  5. Step 5: Solve for x
    x = 4,749,258.71/2,603.55
  6. Step 6: Final answer
    x = 1,824.15

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1.5x scale

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.