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Finding the Fourth Proportional to 741.41, 1,020.19 and 718.87

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Solution

The fourth proportional to 741.41, 1,020.19 and 718.87 is: 989.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.41 : 1,020.19 = 718.87 : x
  2. Step 2: Convert to fraction form
    741.41/1,020.19 = 718.87/x
  3. Step 3: Cross multiply
    741.41x = 1,020.19 × 718.87
  4. Step 4: Simplify right side
    741.41x = 733,378.88
  5. Step 5: Solve for x
    x = 733,378.88/741.41
  6. Step 6: Final answer
    x = 989.17

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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.