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Finding the Fourth Proportional to 280.51, 387.28 and 175.64

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Solution

The fourth proportional to 280.51, 387.28 and 175.64 is: 242.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.51 : 387.28 = 175.64 : x
  2. Step 2: Convert to fraction form
    280.51/387.28 = 175.64/x
  3. Step 3: Cross multiply
    280.51x = 387.28 × 175.64
  4. Step 4: Simplify right side
    280.51x = 68,021.86
  5. Step 5: Solve for x
    x = 68,021.86/280.51
  6. Step 6: Final answer
    x = 242.49

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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.