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Finding the Fourth Proportional to 822.03, 1,231.47 and 410.69

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Solution

The fourth proportional to 822.03, 1,231.47 and 410.69 is: 615.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.03 : 1,231.47 = 410.69 : x
  2. Step 2: Convert to fraction form
    822.03/1,231.47 = 410.69/x
  3. Step 3: Cross multiply
    822.03x = 1,231.47 × 410.69
  4. Step 4: Simplify right side
    822.03x = 505,746.26
  5. Step 5: Solve for x
    x = 505,746.26/822.03
  6. Step 6: Final answer
    x = 615.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.