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Finding the Fourth Proportional to 1,676.32, 2,515.60 and 637.28

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Solution

The fourth proportional to 1,676.32, 2,515.60 and 637.28 is: 956.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.32 : 2,515.60 = 637.28 : x
  2. Step 2: Convert to fraction form
    1,676.32/2,515.60 = 637.28/x
  3. Step 3: Cross multiply
    1,676.32x = 2,515.60 × 637.28
  4. Step 4: Simplify right side
    1,676.32x = 1,603,141.57
  5. Step 5: Solve for x
    x = 1,603,141.57/1,676.32
  6. Step 6: Final answer
    x = 956.35

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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.