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Finding the Fourth Proportional to 989.30, 1,482.67 and 403.62

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Solution

The fourth proportional to 989.30, 1,482.67 and 403.62 is: 604.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.30 : 1,482.67 = 403.62 : x
  2. Step 2: Convert to fraction form
    989.30/1,482.67 = 403.62/x
  3. Step 3: Cross multiply
    989.30x = 1,482.67 × 403.62
  4. Step 4: Simplify right side
    989.30x = 598,434.76
  5. Step 5: Solve for x
    x = 598,434.76/989.30
  6. Step 6: Final answer
    x = 604.91

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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.