Home / 1,419.72-1,957.26-1,388.67

Finding the Fourth Proportional to 1,419.72, 1,957.26 and 1,388.67

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Solution

The fourth proportional to 1,419.72, 1,957.26 and 1,388.67 is: 1,914.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.72 : 1,957.26 = 1,388.67 : x
  2. Step 2: Convert to fraction form
    1,419.72/1,957.26 = 1,388.67/x
  3. Step 3: Cross multiply
    1,419.72x = 1,957.26 × 1,388.67
  4. Step 4: Simplify right side
    1,419.72x = 2,717,988.24
  5. Step 5: Solve for x
    x = 2,717,988.24/1,419.72
  6. Step 6: Final answer
    x = 1,914.45

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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.