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Finding the Fourth Proportional to 3,453.74, 5,181.48 and 988.77

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Solution

The fourth proportional to 3,453.74, 5,181.48 and 988.77 is: 1,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,453.74 : 5,181.48 = 988.77 : x
  2. Step 2: Convert to fraction form
    3,453.74/5,181.48 = 988.77/x
  3. Step 3: Cross multiply
    3,453.74x = 5,181.48 × 988.77
  4. Step 4: Simplify right side
    3,453.74x = 5,123,291.98
  5. Step 5: Solve for x
    x = 5,123,291.98/3,453.74
  6. Step 6: Final answer
    x = 1,483.40

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1.5x scale

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.