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Finding the Fourth Proportional to 1,990.06, 2,985.12 and 603.41

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Solution

The fourth proportional to 1,990.06, 2,985.12 and 603.41 is: 905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.06 : 2,985.12 = 603.41 : x
  2. Step 2: Convert to fraction form
    1,990.06/2,985.12 = 603.41/x
  3. Step 3: Cross multiply
    1,990.06x = 2,985.12 × 603.41
  4. Step 4: Simplify right side
    1,990.06x = 1,801,251.26
  5. Step 5: Solve for x
    x = 1,801,251.26/1,990.06
  6. Step 6: Final answer
    x = 905.12

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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.