Home / 1,695.80-2,538.30-1,328.60

Finding the Fourth Proportional to 1,695.80, 2,538.30 and 1,328.60

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Solution

The fourth proportional to 1,695.80, 2,538.30 and 1,328.60 is: 1,988.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.80 : 2,538.30 = 1,328.60 : x
  2. Step 2: Convert to fraction form
    1,695.80/2,538.30 = 1,328.60/x
  3. Step 3: Cross multiply
    1,695.80x = 2,538.30 × 1,328.60
  4. Step 4: Simplify right side
    1,695.80x = 3,372,385.38
  5. Step 5: Solve for x
    x = 3,372,385.38/1,695.80
  6. Step 6: Final answer
    x = 1,988.67

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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.