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Finding the Fourth Proportional to 402.84, 556.08 and 322.92

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Solution

The fourth proportional to 402.84, 556.08 and 322.92 is: 445.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.84 : 556.08 = 322.92 : x
  2. Step 2: Convert to fraction form
    402.84/556.08 = 322.92/x
  3. Step 3: Cross multiply
    402.84x = 556.08 × 322.92
  4. Step 4: Simplify right side
    402.84x = 179,569.35
  5. Step 5: Solve for x
    x = 179,569.35/402.84
  6. Step 6: Final answer
    x = 445.76

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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.