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Finding the Fourth Proportional to 790.01, 1,089.87 and 495.22

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Solution

The fourth proportional to 790.01, 1,089.87 and 495.22 is: 683.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.01 : 1,089.87 = 495.22 : x
  2. Step 2: Convert to fraction form
    790.01/1,089.87 = 495.22/x
  3. Step 3: Cross multiply
    790.01x = 1,089.87 × 495.22
  4. Step 4: Simplify right side
    790.01x = 539,725.67
  5. Step 5: Solve for x
    x = 539,725.67/790.01
  6. Step 6: Final answer
    x = 683.19

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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.