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Finding the Fourth Proportional to 790.81, 1,091.10 and 759.67

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Solution

The fourth proportional to 790.81, 1,091.10 and 759.67 is: 1,048.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.81 : 1,091.10 = 759.67 : x
  2. Step 2: Convert to fraction form
    790.81/1,091.10 = 759.67/x
  3. Step 3: Cross multiply
    790.81x = 1,091.10 × 759.67
  4. Step 4: Simplify right side
    790.81x = 828,875.94
  5. Step 5: Solve for x
    x = 828,875.94/790.81
  6. Step 6: Final answer
    x = 1,048.14

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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.