Home / 1,428.23-1,969.21-1,055.53

Finding the Fourth Proportional to 1,428.23, 1,969.21 and 1,055.53

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Solution

The fourth proportional to 1,428.23, 1,969.21 and 1,055.53 is: 1,455.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.23 : 1,969.21 = 1,055.53 : x
  2. Step 2: Convert to fraction form
    1,428.23/1,969.21 = 1,055.53/x
  3. Step 3: Cross multiply
    1,428.23x = 1,969.21 × 1,055.53
  4. Step 4: Simplify right side
    1,428.23x = 2,078,564.01
  5. Step 5: Solve for x
    x = 2,078,564.01/1,428.23
  6. Step 6: Final answer
    x = 1,455.34

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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.