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Finding the Fourth Proportional to 1,913.28, 2,867.40 and 873.42

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Solution

The fourth proportional to 1,913.28, 2,867.40 and 873.42 is: 1,308.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.28 : 2,867.40 = 873.42 : x
  2. Step 2: Convert to fraction form
    1,913.28/2,867.40 = 873.42/x
  3. Step 3: Cross multiply
    1,913.28x = 2,867.40 × 873.42
  4. Step 4: Simplify right side
    1,913.28x = 2,504,444.51
  5. Step 5: Solve for x
    x = 2,504,444.51/1,913.28
  6. Step 6: Final answer
    x = 1,308.98

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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.