Home / 1,428.37-2,142.60-454.38

Finding the Fourth Proportional to 1,428.37, 2,142.60 and 454.38

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Solution

The fourth proportional to 1,428.37, 2,142.60 and 454.38 is: 681.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.37 : 2,142.60 = 454.38 : x
  2. Step 2: Convert to fraction form
    1,428.37/2,142.60 = 454.38/x
  3. Step 3: Cross multiply
    1,428.37x = 2,142.60 × 454.38
  4. Step 4: Simplify right side
    1,428.37x = 973,543.88
  5. Step 5: Solve for x
    x = 973,543.88/1,428.37
  6. Step 6: Final answer
    x = 681.58

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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.