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Finding the Fourth Proportional to 790.88, 1,090.50 and 650.48

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Solution

The fourth proportional to 790.88, 1,090.50 and 650.48 is: 896.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.88 : 1,090.50 = 650.48 : x
  2. Step 2: Convert to fraction form
    790.88/1,090.50 = 650.48/x
  3. Step 3: Cross multiply
    790.88x = 1,090.50 × 650.48
  4. Step 4: Simplify right side
    790.88x = 709,348.44
  5. Step 5: Solve for x
    x = 709,348.44/790.88
  6. Step 6: Final answer
    x = 896.91

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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.