Home / 2,174.23-2,999.70-1,428.13

Finding the Fourth Proportional to 2,174.23, 2,999.70 and 1,428.13

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Solution

The fourth proportional to 2,174.23, 2,999.70 and 1,428.13 is: 1,970.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.23 : 2,999.70 = 1,428.13 : x
  2. Step 2: Convert to fraction form
    2,174.23/2,999.70 = 1,428.13/x
  3. Step 3: Cross multiply
    2,174.23x = 2,999.70 × 1,428.13
  4. Step 4: Simplify right side
    2,174.23x = 4,283,961.56
  5. Step 5: Solve for x
    x = 4,283,961.56/2,174.23
  6. Step 6: Final answer
    x = 1,970.34

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1.5x scale

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.