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Finding the Fourth Proportional to 990.57, 1,483.38 and 624.18

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Solution

The fourth proportional to 990.57, 1,483.38 and 624.18 is: 934.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.57 : 1,483.38 = 624.18 : x
  2. Step 2: Convert to fraction form
    990.57/1,483.38 = 624.18/x
  3. Step 3: Cross multiply
    990.57x = 1,483.38 × 624.18
  4. Step 4: Simplify right side
    990.57x = 925,896.13
  5. Step 5: Solve for x
    x = 925,896.13/990.57
  6. Step 6: Final answer
    x = 934.71

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.