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Finding the Fourth Proportional to 983.00, 1,356.14 and 720.56

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Solution

The fourth proportional to 983.00, 1,356.14 and 720.56 is: 994.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.00 : 1,356.14 = 720.56 : x
  2. Step 2: Convert to fraction form
    983.00/1,356.14 = 720.56/x
  3. Step 3: Cross multiply
    983.00x = 1,356.14 × 720.56
  4. Step 4: Simplify right side
    983.00x = 977,185.43
  5. Step 5: Solve for x
    x = 977,185.43/983.00
  6. Step 6: Final answer
    x = 994.08

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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.