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Finding the Fourth Proportional to 790.56, 1,090.89 and 475.83

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Solution

The fourth proportional to 790.56, 1,090.89 and 475.83 is: 656.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.56 : 1,090.89 = 475.83 : x
  2. Step 2: Convert to fraction form
    790.56/1,090.89 = 475.83/x
  3. Step 3: Cross multiply
    790.56x = 1,090.89 × 475.83
  4. Step 4: Simplify right side
    790.56x = 519,078.19
  5. Step 5: Solve for x
    x = 519,078.19/790.56
  6. Step 6: Final answer
    x = 656.60

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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.