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Finding the Fourth Proportional to 719.20, 1,076.16 and 626.56

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Solution

The fourth proportional to 719.20, 1,076.16 and 626.56 is: 937.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.20 : 1,076.16 = 626.56 : x
  2. Step 2: Convert to fraction form
    719.20/1,076.16 = 626.56/x
  3. Step 3: Cross multiply
    719.20x = 1,076.16 × 626.56
  4. Step 4: Simplify right side
    719.20x = 674,278.81
  5. Step 5: Solve for x
    x = 674,278.81/719.20
  6. Step 6: Final answer
    x = 937.54

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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.