Home / 1,419.04-1,959.28-921.92

Finding the Fourth Proportional to 1,419.04, 1,959.28 and 921.92

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Solution

The fourth proportional to 1,419.04, 1,959.28 and 921.92 is: 1,272.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.04 : 1,959.28 = 921.92 : x
  2. Step 2: Convert to fraction form
    1,419.04/1,959.28 = 921.92/x
  3. Step 3: Cross multiply
    1,419.04x = 1,959.28 × 921.92
  4. Step 4: Simplify right side
    1,419.04x = 1,806,299.42
  5. Step 5: Solve for x
    x = 1,806,299.42/1,419.04
  6. Step 6: Final answer
    x = 1,272.90

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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.