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Finding the Fourth Proportional to 1,993.12, 2,990.10 and 606.30

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Solution

The fourth proportional to 1,993.12, 2,990.10 and 606.30 is: 909.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.12 : 2,990.10 = 606.30 : x
  2. Step 2: Convert to fraction form
    1,993.12/2,990.10 = 606.30/x
  3. Step 3: Cross multiply
    1,993.12x = 2,990.10 × 606.30
  4. Step 4: Simplify right side
    1,993.12x = 1,812,897.63
  5. Step 5: Solve for x
    x = 1,812,897.63/1,993.12
  6. Step 6: Final answer
    x = 909.58

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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.