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Finding the Fourth Proportional to 788.30, 1,181.23 and 541.62

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Solution

The fourth proportional to 788.30, 1,181.23 and 541.62 is: 811.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.30 : 1,181.23 = 541.62 : x
  2. Step 2: Convert to fraction form
    788.30/1,181.23 = 541.62/x
  3. Step 3: Cross multiply
    788.30x = 1,181.23 × 541.62
  4. Step 4: Simplify right side
    788.30x = 639,783.91
  5. Step 5: Solve for x
    x = 639,783.91/788.30
  6. Step 6: Final answer
    x = 811.60

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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.