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Finding the Fourth Proportional to 790.66, 1,090.13 and 495.41

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Solution

The fourth proportional to 790.66, 1,090.13 and 495.41 is: 683.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.66 : 1,090.13 = 495.41 : x
  2. Step 2: Convert to fraction form
    790.66/1,090.13 = 495.41/x
  3. Step 3: Cross multiply
    790.66x = 1,090.13 × 495.41
  4. Step 4: Simplify right side
    790.66x = 540,061.30
  5. Step 5: Solve for x
    x = 540,061.30/790.66
  6. Step 6: Final answer
    x = 683.05

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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.