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Finding the Fourth Proportional to 1,918.64, 2,874.18 and 1,783.64

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Solution

The fourth proportional to 1,918.64, 2,874.18 and 1,783.64 is: 2,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.64 : 2,874.18 = 1,783.64 : x
  2. Step 2: Convert to fraction form
    1,918.64/2,874.18 = 1,783.64/x
  3. Step 3: Cross multiply
    1,918.64x = 2,874.18 × 1,783.64
  4. Step 4: Simplify right side
    1,918.64x = 5,126,502.42
  5. Step 5: Solve for x
    x = 5,126,502.42/1,918.64
  6. Step 6: Final answer
    x = 2,671.95

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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.