Home / 990.03-1,485.35-405.27

Finding the Fourth Proportional to 990.03, 1,485.35 and 405.27

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Solution

The fourth proportional to 990.03, 1,485.35 and 405.27 is: 608.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.03 : 1,485.35 = 405.27 : x
  2. Step 2: Convert to fraction form
    990.03/1,485.35 = 405.27/x
  3. Step 3: Cross multiply
    990.03x = 1,485.35 × 405.27
  4. Step 4: Simplify right side
    990.03x = 601,958.34
  5. Step 5: Solve for x
    x = 601,958.34/990.03
  6. Step 6: Final answer
    x = 608.02

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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.