Home / 285,428.36-427,939.88-143,171.30

Finding the Fourth Proportional to 285,428.36, 427,939.88 and 143,171.30

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Solution

The fourth proportional to 285,428.36, 427,939.88 and 143,171.30 is: 214,655.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,428.36 : 427,939.88 = 143,171.30 : x
  2. Step 2: Convert to fraction form
    285,428.36/427,939.88 = 143,171.30/x
  3. Step 3: Cross multiply
    285,428.36x = 427,939.88 × 143,171.30
  4. Step 4: Simplify right side
    285,428.36x = 61,268,706,085.89
  5. Step 5: Solve for x
    x = 61,268,706,085.89/285,428.36
  6. Step 6: Final answer
    x = 214,655.29

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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.