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Finding the Fourth Proportional to 744.51, 1,028.70 and 718.23

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Solution

The fourth proportional to 744.51, 1,028.70 and 718.23 is: 992.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.51 : 1,028.70 = 718.23 : x
  2. Step 2: Convert to fraction form
    744.51/1,028.70 = 718.23/x
  3. Step 3: Cross multiply
    744.51x = 1,028.70 × 718.23
  4. Step 4: Simplify right side
    744.51x = 738,843.20
  5. Step 5: Solve for x
    x = 738,843.20/744.51
  6. Step 6: Final answer
    x = 992.39

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Half scale
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Double scale
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1.5x scale

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.