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Finding the Fourth Proportional to 453, 625.21 and 278.45

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Solution

The fourth proportional to 453, 625.21 and 278.45 is: 384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    453 : 625.21 = 278.45 : x
  2. Step 2: Convert to fraction form
    453/625.21 = 278.45/x
  3. Step 3: Cross multiply
    453x = 625.21 × 278.45
  4. Step 4: Simplify right side
    453x = 174,089.72
  5. Step 5: Solve for x
    x = 174,089.72/453
  6. Step 6: Final answer
    x = 384.30

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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.