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Finding the Fourth Proportional to 1,176.08, 1,622.99 and 644.99

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Solution

The fourth proportional to 1,176.08, 1,622.99 and 644.99 is: 890.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.08 : 1,622.99 = 644.99 : x
  2. Step 2: Convert to fraction form
    1,176.08/1,622.99 = 644.99/x
  3. Step 3: Cross multiply
    1,176.08x = 1,622.99 × 644.99
  4. Step 4: Simplify right side
    1,176.08x = 1,046,817.99
  5. Step 5: Solve for x
    x = 1,046,817.99/1,176.08
  6. Step 6: Final answer
    x = 890.09

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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.