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Finding the Fourth Proportional to 1,919.03, 2,878.10 and 749.06

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Solution

The fourth proportional to 1,919.03, 2,878.10 and 749.06 is: 1,123.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.03 : 2,878.10 = 749.06 : x
  2. Step 2: Convert to fraction form
    1,919.03/2,878.10 = 749.06/x
  3. Step 3: Cross multiply
    1,919.03x = 2,878.10 × 749.06
  4. Step 4: Simplify right side
    1,919.03x = 2,155,851.45
  5. Step 5: Solve for x
    x = 2,155,851.45/1,919.03
  6. Step 6: Final answer
    x = 1,123.41

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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.