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Finding the Fourth Proportional to 273.13, 376.86 and 156.70

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Solution

The fourth proportional to 273.13, 376.86 and 156.70 is: 216.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.13 : 376.86 = 156.70 : x
  2. Step 2: Convert to fraction form
    273.13/376.86 = 156.70/x
  3. Step 3: Cross multiply
    273.13x = 376.86 × 156.70
  4. Step 4: Simplify right side
    273.13x = 59,053.96
  5. Step 5: Solve for x
    x = 59,053.96/273.13
  6. Step 6: Final answer
    x = 216.21

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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.