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Finding the Fourth Proportional to 284.22, 423.48 and 253.53

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Solution

The fourth proportional to 284.22, 423.48 and 253.53 is: 377.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.22 : 423.48 = 253.53 : x
  2. Step 2: Convert to fraction form
    284.22/423.48 = 253.53/x
  3. Step 3: Cross multiply
    284.22x = 423.48 × 253.53
  4. Step 4: Simplify right side
    284.22x = 107,364.88
  5. Step 5: Solve for x
    x = 107,364.88/284.22
  6. Step 6: Final answer
    x = 377.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.