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Finding the Fourth Proportional to 995.15, 1,489.76 and 603.97

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Solution

The fourth proportional to 995.15, 1,489.76 and 603.97 is: 904.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.15 : 1,489.76 = 603.97 : x
  2. Step 2: Convert to fraction form
    995.15/1,489.76 = 603.97/x
  3. Step 3: Cross multiply
    995.15x = 1,489.76 × 603.97
  4. Step 4: Simplify right side
    995.15x = 899,763.60
  5. Step 5: Solve for x
    x = 899,763.60/995.15
  6. Step 6: Final answer
    x = 904.15

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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.