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Finding the Fourth Proportional to 1,676.19, 2,515.43 and 580.55

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Solution

The fourth proportional to 1,676.19, 2,515.43 and 580.55 is: 871.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.19 : 2,515.43 = 580.55 : x
  2. Step 2: Convert to fraction form
    1,676.19/2,515.43 = 580.55/x
  3. Step 3: Cross multiply
    1,676.19x = 2,515.43 × 580.55
  4. Step 4: Simplify right side
    1,676.19x = 1,460,332.89
  5. Step 5: Solve for x
    x = 1,460,332.89/1,676.19
  6. Step 6: Final answer
    x = 871.22

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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.