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Finding the Fourth Proportional to 3,455.62, 5,184.24 and 990.38

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Solution

The fourth proportional to 3,455.62, 5,184.24 and 990.38 is: 1,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.62 : 5,184.24 = 990.38 : x
  2. Step 2: Convert to fraction form
    3,455.62/5,184.24 = 990.38/x
  3. Step 3: Cross multiply
    3,455.62x = 5,184.24 × 990.38
  4. Step 4: Simplify right side
    3,455.62x = 5,134,367.61
  5. Step 5: Solve for x
    x = 5,134,367.61/3,455.62
  6. Step 6: Final answer
    x = 1,485.80

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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.