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Finding the Fourth Proportional to 983.00, 1,356.31 and 717.58

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Solution

The fourth proportional to 983.00, 1,356.31 and 717.58 is: 990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.00 : 1,356.31 = 717.58 : x
  2. Step 2: Convert to fraction form
    983.00/1,356.31 = 717.58/x
  3. Step 3: Cross multiply
    983.00x = 1,356.31 × 717.58
  4. Step 4: Simplify right side
    983.00x = 973,267.81
  5. Step 5: Solve for x
    x = 973,267.81/983.00
  6. Step 6: Final answer
    x = 990.10

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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.