Home / 1,420.24-1,960.68-1,071.76

Finding the Fourth Proportional to 1,420.24, 1,960.68 and 1,071.76

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Solution

The fourth proportional to 1,420.24, 1,960.68 and 1,071.76 is: 1,479.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.24 : 1,960.68 = 1,071.76 : x
  2. Step 2: Convert to fraction form
    1,420.24/1,960.68 = 1,071.76/x
  3. Step 3: Cross multiply
    1,420.24x = 1,960.68 × 1,071.76
  4. Step 4: Simplify right side
    1,420.24x = 2,101,378.40
  5. Step 5: Solve for x
    x = 2,101,378.40/1,420.24
  6. Step 6: Final answer
    x = 1,479.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.