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Finding the Fourth Proportional to 280.28, 420.76 and 176.32

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Solution

The fourth proportional to 280.28, 420.76 and 176.32 is: 264.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.28 : 420.76 = 176.32 : x
  2. Step 2: Convert to fraction form
    280.28/420.76 = 176.32/x
  3. Step 3: Cross multiply
    280.28x = 420.76 × 176.32
  4. Step 4: Simplify right side
    280.28x = 74,188.40
  5. Step 5: Solve for x
    x = 74,188.40/280.28
  6. Step 6: Final answer
    x = 264.69

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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.