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Finding the Fourth Proportional to 278.36, 417.63 and 83.36

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Solution

The fourth proportional to 278.36, 417.63 and 83.36 is: 125.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.36 : 417.63 = 83.36 : x
  2. Step 2: Convert to fraction form
    278.36/417.63 = 83.36/x
  3. Step 3: Cross multiply
    278.36x = 417.63 × 83.36
  4. Step 4: Simplify right side
    278.36x = 34,814.99
  5. Step 5: Solve for x
    x = 34,814.99/278.36
  6. Step 6: Final answer
    x = 125.07

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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.