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Finding the Fourth Proportional to 1,697.72, 2,546.19 and 657.68

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Solution

The fourth proportional to 1,697.72, 2,546.19 and 657.68 is: 986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697.72 : 2,546.19 = 657.68 : x
  2. Step 2: Convert to fraction form
    1,697.72/2,546.19 = 657.68/x
  3. Step 3: Cross multiply
    1,697.72x = 2,546.19 × 657.68
  4. Step 4: Simplify right side
    1,697.72x = 1,674,565.51
  5. Step 5: Solve for x
    x = 1,674,565.51/1,697.72
  6. Step 6: Final answer
    x = 986.36

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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.