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Finding the Fourth Proportional to 497.60, 686.68 and 322.94

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Solution

The fourth proportional to 497.60, 686.68 and 322.94 is: 445.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.60 : 686.68 = 322.94 : x
  2. Step 2: Convert to fraction form
    497.60/686.68 = 322.94/x
  3. Step 3: Cross multiply
    497.60x = 686.68 × 322.94
  4. Step 4: Simplify right side
    497.60x = 221,756.44
  5. Step 5: Solve for x
    x = 221,756.44/497.60
  6. Step 6: Final answer
    x = 445.65

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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.