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Finding the Fourth Proportional to 990.00, 1,483.59 and 677.36

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Solution

The fourth proportional to 990.00, 1,483.59 and 677.36 is: 1,015.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.00 : 1,483.59 = 677.36 : x
  2. Step 2: Convert to fraction form
    990.00/1,483.59 = 677.36/x
  3. Step 3: Cross multiply
    990.00x = 1,483.59 × 677.36
  4. Step 4: Simplify right side
    990.00x = 1,004,928.87
  5. Step 5: Solve for x
    x = 1,004,928.87/990.00
  6. Step 6: Final answer
    x = 1,015.08

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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.