Home / 1,385.24-2,076.48-1,139.20

Finding the Fourth Proportional to 1,385.24, 2,076.48 and 1,139.20

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Solution

The fourth proportional to 1,385.24, 2,076.48 and 1,139.20 is: 1,707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.24 : 2,076.48 = 1,139.20 : x
  2. Step 2: Convert to fraction form
    1,385.24/2,076.48 = 1,139.20/x
  3. Step 3: Cross multiply
    1,385.24x = 2,076.48 × 1,139.20
  4. Step 4: Simplify right side
    1,385.24x = 2,365,520.82
  5. Step 5: Solve for x
    x = 2,365,520.82/1,385.24
  6. Step 6: Final answer
    x = 1,707.67

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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.