Home / 3,455.30-5,182.13-989.66

Finding the Fourth Proportional to 3,455.30, 5,182.13 and 989.66

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Solution

The fourth proportional to 3,455.30, 5,182.13 and 989.66 is: 1,484.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.30 : 5,182.13 = 989.66 : x
  2. Step 2: Convert to fraction form
    3,455.30/5,182.13 = 989.66/x
  3. Step 3: Cross multiply
    3,455.30x = 5,182.13 × 989.66
  4. Step 4: Simplify right side
    3,455.30x = 5,128,523.34
  5. Step 5: Solve for x
    x = 5,128,523.34/3,455.30
  6. Step 6: Final answer
    x = 1,484.25

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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.