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Finding the Fourth Proportional to 2,489.55, 3,435.53 and 1,427.51

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Solution

The fourth proportional to 2,489.55, 3,435.53 and 1,427.51 is: 1,969.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.55 : 3,435.53 = 1,427.51 : x
  2. Step 2: Convert to fraction form
    2,489.55/3,435.53 = 1,427.51/x
  3. Step 3: Cross multiply
    2,489.55x = 3,435.53 × 1,427.51
  4. Step 4: Simplify right side
    2,489.55x = 4,904,229.12
  5. Step 5: Solve for x
    x = 4,904,229.12/2,489.55
  6. Step 6: Final answer
    x = 1,969.93

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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.