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Finding the Fourth Proportional to 1,181.61, 1,630.64 and 650.55

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Solution

The fourth proportional to 1,181.61, 1,630.64 and 650.55 is: 897.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.61 : 1,630.64 = 650.55 : x
  2. Step 2: Convert to fraction form
    1,181.61/1,630.64 = 650.55/x
  3. Step 3: Cross multiply
    1,181.61x = 1,630.64 × 650.55
  4. Step 4: Simplify right side
    1,181.61x = 1,060,816.93
  5. Step 5: Solve for x
    x = 1,060,816.93/1,181.61
  6. Step 6: Final answer
    x = 897.77

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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.