Home / 1,428.02-2,142.33-454.13

Finding the Fourth Proportional to 1,428.02, 2,142.33 and 454.13

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Solution

The fourth proportional to 1,428.02, 2,142.33 and 454.13 is: 681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.02 : 2,142.33 = 454.13 : x
  2. Step 2: Convert to fraction form
    1,428.02/2,142.33 = 454.13/x
  3. Step 3: Cross multiply
    1,428.02x = 2,142.33 × 454.13
  4. Step 4: Simplify right side
    1,428.02x = 972,896.32
  5. Step 5: Solve for x
    x = 972,896.32/1,428.02
  6. Step 6: Final answer
    x = 681.29

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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.