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Finding the Fourth Proportional to 988.99, 1,483.99 and 441.04

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Solution

The fourth proportional to 988.99, 1,483.99 and 441.04 is: 661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.99 : 1,483.99 = 441.04 : x
  2. Step 2: Convert to fraction form
    988.99/1,483.99 = 441.04/x
  3. Step 3: Cross multiply
    988.99x = 1,483.99 × 441.04
  4. Step 4: Simplify right side
    988.99x = 654,494.14
  5. Step 5: Solve for x
    x = 654,494.14/988.99
  6. Step 6: Final answer
    x = 661.78

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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.