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Finding the Fourth Proportional to 278.06, 383.69 and 160.07

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Solution

The fourth proportional to 278.06, 383.69 and 160.07 is: 220.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.06 : 383.69 = 160.07 : x
  2. Step 2: Convert to fraction form
    278.06/383.69 = 160.07/x
  3. Step 3: Cross multiply
    278.06x = 383.69 × 160.07
  4. Step 4: Simplify right side
    278.06x = 61,417.26
  5. Step 5: Solve for x
    x = 61,417.26/278.06
  6. Step 6: Final answer
    x = 220.88

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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.