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Finding the Fourth Proportional to 1,454.19, 2,007.50 and 990.87

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Solution

The fourth proportional to 1,454.19, 2,007.50 and 990.87 is: 1,367.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.19 : 2,007.50 = 990.87 : x
  2. Step 2: Convert to fraction form
    1,454.19/2,007.50 = 990.87/x
  3. Step 3: Cross multiply
    1,454.19x = 2,007.50 × 990.87
  4. Step 4: Simplify right side
    1,454.19x = 1,989,166.57
  5. Step 5: Solve for x
    x = 1,989,166.57/1,454.19
  6. Step 6: Final answer
    x = 1,367.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.