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Finding the Fourth Proportional to 2,872.40, 4,308.60 and 1,025.60

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Solution

The fourth proportional to 2,872.40, 4,308.60 and 1,025.60 is: 1,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.40 : 4,308.60 = 1,025.60 : x
  2. Step 2: Convert to fraction form
    2,872.40/4,308.60 = 1,025.60/x
  3. Step 3: Cross multiply
    2,872.40x = 4,308.60 × 1,025.60
  4. Step 4: Simplify right side
    2,872.40x = 4,418,900.16
  5. Step 5: Solve for x
    x = 4,418,900.16/2,872.40
  6. Step 6: Final answer
    x = 1,538.40

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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.