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Finding the Fourth Proportional to 3,493.48, 4,821 and 1,921.69

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Solution

The fourth proportional to 3,493.48, 4,821 and 1,921.69 is: 2,651.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.48 : 4,821 = 1,921.69 : x
  2. Step 2: Convert to fraction form
    3,493.48/4,821 = 1,921.69/x
  3. Step 3: Cross multiply
    3,493.48x = 4,821 × 1,921.69
  4. Step 4: Simplify right side
    3,493.48x = 9,264,467.49
  5. Step 5: Solve for x
    x = 9,264,467.49/3,493.48
  6. Step 6: Final answer
    x = 2,651.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.