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Finding the Fourth Proportional to 989.69, 1,483.86 and 599.79

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Solution

The fourth proportional to 989.69, 1,483.86 and 599.79 is: 899.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.69 : 1,483.86 = 599.79 : x
  2. Step 2: Convert to fraction form
    989.69/1,483.86 = 599.79/x
  3. Step 3: Cross multiply
    989.69x = 1,483.86 × 599.79
  4. Step 4: Simplify right side
    989.69x = 890,004.39
  5. Step 5: Solve for x
    x = 890,004.39/989.69
  6. Step 6: Final answer
    x = 899.27

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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.