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Finding the Fourth Proportional to 278.35, 417.41 and 148.26

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Solution

The fourth proportional to 278.35, 417.41 and 148.26 is: 222.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.35 : 417.41 = 148.26 : x
  2. Step 2: Convert to fraction form
    278.35/417.41 = 148.26/x
  3. Step 3: Cross multiply
    278.35x = 417.41 × 148.26
  4. Step 4: Simplify right side
    278.35x = 61,885.21
  5. Step 5: Solve for x
    x = 61,885.21/278.35
  6. Step 6: Final answer
    x = 222.33

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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.