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Finding the Fourth Proportional to 275.02, 379.51 and 157.00

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Solution

The fourth proportional to 275.02, 379.51 and 157.00 is: 216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.02 : 379.51 = 157.00 : x
  2. Step 2: Convert to fraction form
    275.02/379.51 = 157.00/x
  3. Step 3: Cross multiply
    275.02x = 379.51 × 157.00
  4. Step 4: Simplify right side
    275.02x = 59,581.73
  5. Step 5: Solve for x
    x = 59,581.73/275.02
  6. Step 6: Final answer
    x = 216.65

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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.