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Finding the Fourth Proportional to 1,052.79, 1,576.43 and 682.03

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Solution

The fourth proportional to 1,052.79, 1,576.43 and 682.03 is: 1,021.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.79 : 1,576.43 = 682.03 : x
  2. Step 2: Convert to fraction form
    1,052.79/1,576.43 = 682.03/x
  3. Step 3: Cross multiply
    1,052.79x = 1,576.43 × 682.03
  4. Step 4: Simplify right side
    1,052.79x = 1,075,164.80
  5. Step 5: Solve for x
    x = 1,075,164.80/1,052.79
  6. Step 6: Final answer
    x = 1,021.25

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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.