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Finding the Fourth Proportional to 989.04, 1,484.41 and 550.73

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Solution

The fourth proportional to 989.04, 1,484.41 and 550.73 is: 826.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.04 : 1,484.41 = 550.73 : x
  2. Step 2: Convert to fraction form
    989.04/1,484.41 = 550.73/x
  3. Step 3: Cross multiply
    989.04x = 1,484.41 × 550.73
  4. Step 4: Simplify right side
    989.04x = 817,509.12
  5. Step 5: Solve for x
    x = 817,509.12/989.04
  6. Step 6: Final answer
    x = 826.57

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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.