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Finding the Fourth Proportional to 426.96, 589.68 and 322.56

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Solution

The fourth proportional to 426.96, 589.68 and 322.56 is: 445.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.96 : 589.68 = 322.56 : x
  2. Step 2: Convert to fraction form
    426.96/589.68 = 322.56/x
  3. Step 3: Cross multiply
    426.96x = 589.68 × 322.56
  4. Step 4: Simplify right side
    426.96x = 190,207.18
  5. Step 5: Solve for x
    x = 190,207.18/426.96
  6. Step 6: Final answer
    x = 445.49

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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.