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Finding the Fourth Proportional to 1,635.67, 2,448.60 and 987.67

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Solution

The fourth proportional to 1,635.67, 2,448.60 and 987.67 is: 1,478.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.67 : 2,448.60 = 987.67 : x
  2. Step 2: Convert to fraction form
    1,635.67/2,448.60 = 987.67/x
  3. Step 3: Cross multiply
    1,635.67x = 2,448.60 × 987.67
  4. Step 4: Simplify right side
    1,635.67x = 2,418,408.76
  5. Step 5: Solve for x
    x = 2,418,408.76/1,635.67
  6. Step 6: Final answer
    x = 1,478.54

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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.