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Finding the Fourth Proportional to 787.08, 1,181.16 and 543.84

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Solution

The fourth proportional to 787.08, 1,181.16 and 543.84 is: 816.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.08 : 1,181.16 = 543.84 : x
  2. Step 2: Convert to fraction form
    787.08/1,181.16 = 543.84/x
  3. Step 3: Cross multiply
    787.08x = 1,181.16 × 543.84
  4. Step 4: Simplify right side
    787.08x = 642,362.05
  5. Step 5: Solve for x
    x = 642,362.05/787.08
  6. Step 6: Final answer
    x = 816.13

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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.