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Finding the Fourth Proportional to 995.16, 1,490.58 and 669.54

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Solution

The fourth proportional to 995.16, 1,490.58 and 669.54 is: 1,002.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.16 : 1,490.58 = 669.54 : x
  2. Step 2: Convert to fraction form
    995.16/1,490.58 = 669.54/x
  3. Step 3: Cross multiply
    995.16x = 1,490.58 × 669.54
  4. Step 4: Simplify right side
    995.16x = 998,002.93
  5. Step 5: Solve for x
    x = 998,002.93/995.16
  6. Step 6: Final answer
    x = 1,002.86

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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.