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Finding the Fourth Proportional to 453.07, 625.21 and 278.38

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Solution

The fourth proportional to 453.07, 625.21 and 278.38 is: 384.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.07 : 625.21 = 278.38 : x
  2. Step 2: Convert to fraction form
    453.07/625.21 = 278.38/x
  3. Step 3: Cross multiply
    453.07x = 625.21 × 278.38
  4. Step 4: Simplify right side
    453.07x = 174,045.96
  5. Step 5: Solve for x
    x = 174,045.96/453.07
  6. Step 6: Final answer
    x = 384.15

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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.