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Finding the Fourth Proportional to 453.41, 625.75 and 278.75

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Solution

The fourth proportional to 453.41, 625.75 and 278.75 is: 384.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.41 : 625.75 = 278.75 : x
  2. Step 2: Convert to fraction form
    453.41/625.75 = 278.75/x
  3. Step 3: Cross multiply
    453.41x = 625.75 × 278.75
  4. Step 4: Simplify right side
    453.41x = 174,427.81
  5. Step 5: Solve for x
    x = 174,427.81/453.41
  6. Step 6: Final answer
    x = 384.70

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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.