Home / 1,419.04-1,958.64-921.76

Finding the Fourth Proportional to 1,419.04, 1,958.64 and 921.76

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Solution

The fourth proportional to 1,419.04, 1,958.64 and 921.76 is: 1,272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.04 : 1,958.64 = 921.76 : x
  2. Step 2: Convert to fraction form
    1,419.04/1,958.64 = 921.76/x
  3. Step 3: Cross multiply
    1,419.04x = 1,958.64 × 921.76
  4. Step 4: Simplify right side
    1,419.04x = 1,805,396.01
  5. Step 5: Solve for x
    x = 1,805,396.01/1,419.04
  6. Step 6: Final answer
    x = 1,272.27

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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.