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Finding the Fourth Proportional to 990.13, 1,362.03 and 950.17

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Solution

The fourth proportional to 990.13, 1,362.03 and 950.17 is: 1,307.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.13 : 1,362.03 = 950.17 : x
  2. Step 2: Convert to fraction form
    990.13/1,362.03 = 950.17/x
  3. Step 3: Cross multiply
    990.13x = 1,362.03 × 950.17
  4. Step 4: Simplify right side
    990.13x = 1,294,160.05
  5. Step 5: Solve for x
    x = 1,294,160.05/990.13
  6. Step 6: Final answer
    x = 1,307.06

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Why These Related Problems?

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