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Finding the Fourth Proportional to 453.18, 625.72 and 313.22

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Solution

The fourth proportional to 453.18, 625.72 and 313.22 is: 432.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.18 : 625.72 = 313.22 : x
  2. Step 2: Convert to fraction form
    453.18/625.72 = 313.22/x
  3. Step 3: Cross multiply
    453.18x = 625.72 × 313.22
  4. Step 4: Simplify right side
    453.18x = 195,988.02
  5. Step 5: Solve for x
    x = 195,988.02/453.18
  6. Step 6: Final answer
    x = 432.47

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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.