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Finding the Fourth Proportional to 453, 625.38 and 315.24

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Solution

The fourth proportional to 453, 625.38 and 315.24 is: 435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    453 : 625.38 = 315.24 : x
  2. Step 2: Convert to fraction form
    453/625.38 = 315.24/x
  3. Step 3: Cross multiply
    453x = 625.38 × 315.24
  4. Step 4: Simplify right side
    453x = 197,144.79
  5. Step 5: Solve for x
    x = 197,144.79/453
  6. Step 6: Final answer
    x = 435.20

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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.