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Finding the Fourth Proportional to 744.99, 1,028.55 and 698.50

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Solution

The fourth proportional to 744.99, 1,028.55 and 698.50 is: 964.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.99 : 1,028.55 = 698.50 : x
  2. Step 2: Convert to fraction form
    744.99/1,028.55 = 698.50/x
  3. Step 3: Cross multiply
    744.99x = 1,028.55 × 698.50
  4. Step 4: Simplify right side
    744.99x = 718,442.18
  5. Step 5: Solve for x
    x = 718,442.18/744.99
  6. Step 6: Final answer
    x = 964.36

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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.