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Finding the Fourth Proportional to 280.92, 420.90 and 183.63

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Solution

The fourth proportional to 280.92, 420.90 and 183.63 is: 275.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.92 : 420.90 = 183.63 : x
  2. Step 2: Convert to fraction form
    280.92/420.90 = 183.63/x
  3. Step 3: Cross multiply
    280.92x = 420.90 × 183.63
  4. Step 4: Simplify right side
    280.92x = 77,290.76
  5. Step 5: Solve for x
    x = 77,290.76/280.92
  6. Step 6: Final answer
    x = 275.14

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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.