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Finding the Fourth Proportional to 2,376.65, 3,562.42 and 989.62

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Solution

The fourth proportional to 2,376.65, 3,562.42 and 989.62 is: 1,483.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,376.65 : 3,562.42 = 989.62 : x
  2. Step 2: Convert to fraction form
    2,376.65/3,562.42 = 989.62/x
  3. Step 3: Cross multiply
    2,376.65x = 3,562.42 × 989.62
  4. Step 4: Simplify right side
    2,376.65x = 3,525,431.16
  5. Step 5: Solve for x
    x = 3,525,431.16/2,376.65
  6. Step 6: Final answer
    x = 1,483.36

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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.