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Finding the Fourth Proportional to 6,605, 9,908.04 and 1,988

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Solution

The fourth proportional to 6,605, 9,908.04 and 1,988 is: 2,982.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,605 : 9,908.04 = 1,988 : x
  2. Step 2: Convert to fraction form
    6,605/9,908.04 = 1,988/x
  3. Step 3: Cross multiply
    6,605x = 9,908.04 × 1,988
  4. Step 4: Simplify right side
    6,605x = 19,697,183.52
  5. Step 5: Solve for x
    x = 19,697,183.52/6,605
  6. Step 6: Final answer
    x = 2,982.16

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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.