Home / 1,419.38-2,127.26-638.54

Finding the Fourth Proportional to 1,419.38, 2,127.26 and 638.54

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Solution

The fourth proportional to 1,419.38, 2,127.26 and 638.54 is: 957.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.38 : 2,127.26 = 638.54 : x
  2. Step 2: Convert to fraction form
    1,419.38/2,127.26 = 638.54/x
  3. Step 3: Cross multiply
    1,419.38x = 2,127.26 × 638.54
  4. Step 4: Simplify right side
    1,419.38x = 1,358,340.60
  5. Step 5: Solve for x
    x = 1,358,340.60/1,419.38
  6. Step 6: Final answer
    x = 957.00

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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.