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Finding the Fourth Proportional to 876.06, 1,311.30 and 629.10

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Solution

The fourth proportional to 876.06, 1,311.30 and 629.10 is: 941.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.06 : 1,311.30 = 629.10 : x
  2. Step 2: Convert to fraction form
    876.06/1,311.30 = 629.10/x
  3. Step 3: Cross multiply
    876.06x = 1,311.30 × 629.10
  4. Step 4: Simplify right side
    876.06x = 824,938.83
  5. Step 5: Solve for x
    x = 824,938.83/876.06
  6. Step 6: Final answer
    x = 941.65

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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.