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Finding the Fourth Proportional to 453.56, 679.10 and 290.74

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Solution

The fourth proportional to 453.56, 679.10 and 290.74 is: 435.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.56 : 679.10 = 290.74 : x
  2. Step 2: Convert to fraction form
    453.56/679.10 = 290.74/x
  3. Step 3: Cross multiply
    453.56x = 679.10 × 290.74
  4. Step 4: Simplify right side
    453.56x = 197,441.53
  5. Step 5: Solve for x
    x = 197,441.53/453.56
  6. Step 6: Final answer
    x = 435.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.