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Finding the Fourth Proportional to 278.94, 384.94 and 162.50

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Solution

The fourth proportional to 278.94, 384.94 and 162.50 is: 224.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.94 : 384.94 = 162.50 : x
  2. Step 2: Convert to fraction form
    278.94/384.94 = 162.50/x
  3. Step 3: Cross multiply
    278.94x = 384.94 × 162.50
  4. Step 4: Simplify right side
    278.94x = 62,552.75
  5. Step 5: Solve for x
    x = 62,552.75/278.94
  6. Step 6: Final answer
    x = 224.25

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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.