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Finding the Fourth Proportional to 278.94, 417.57 and 210.63

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Solution

The fourth proportional to 278.94, 417.57 and 210.63 is: 315.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.94 : 417.57 = 210.63 : x
  2. Step 2: Convert to fraction form
    278.94/417.57 = 210.63/x
  3. Step 3: Cross multiply
    278.94x = 417.57 × 210.63
  4. Step 4: Simplify right side
    278.94x = 87,952.77
  5. Step 5: Solve for x
    x = 87,952.77/278.94
  6. Step 6: Final answer
    x = 315.31

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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.