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Finding the Fourth Proportional to 790.53, 1,090.85 and 458.91

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Solution

The fourth proportional to 790.53, 1,090.85 and 458.91 is: 633.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.53 : 1,090.85 = 458.91 : x
  2. Step 2: Convert to fraction form
    790.53/1,090.85 = 458.91/x
  3. Step 3: Cross multiply
    790.53x = 1,090.85 × 458.91
  4. Step 4: Simplify right side
    790.53x = 500,599.68
  5. Step 5: Solve for x
    x = 500,599.68/790.53
  6. Step 6: Final answer
    x = 633.25

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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.