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Finding the Fourth Proportional to 741.81, 1,020.65 and 723.59

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Solution

The fourth proportional to 741.81, 1,020.65 and 723.59 is: 995.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.81 : 1,020.65 = 723.59 : x
  2. Step 2: Convert to fraction form
    741.81/1,020.65 = 723.59/x
  3. Step 3: Cross multiply
    741.81x = 1,020.65 × 723.59
  4. Step 4: Simplify right side
    741.81x = 738,532.13
  5. Step 5: Solve for x
    x = 738,532.13/741.81
  6. Step 6: Final answer
    x = 995.58

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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.