Home / 1,657.30-2,485.54-1,112.78

Finding the Fourth Proportional to 1,657.30, 2,485.54 and 1,112.78

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Solution

The fourth proportional to 1,657.30, 2,485.54 and 1,112.78 is: 1,668.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.30 : 2,485.54 = 1,112.78 : x
  2. Step 2: Convert to fraction form
    1,657.30/2,485.54 = 1,112.78/x
  3. Step 3: Cross multiply
    1,657.30x = 2,485.54 × 1,112.78
  4. Step 4: Simplify right side
    1,657.30x = 2,765,841.21
  5. Step 5: Solve for x
    x = 2,765,841.21/1,657.30
  6. Step 6: Final answer
    x = 1,668.89

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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.