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Finding the Fourth Proportional to 671.82, 926.20 and 474.99

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Solution

The fourth proportional to 671.82, 926.20 and 474.99 is: 654.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.82 : 926.20 = 474.99 : x
  2. Step 2: Convert to fraction form
    671.82/926.20 = 474.99/x
  3. Step 3: Cross multiply
    671.82x = 926.20 × 474.99
  4. Step 4: Simplify right side
    671.82x = 439,935.74
  5. Step 5: Solve for x
    x = 439,935.74/671.82
  6. Step 6: Final answer
    x = 654.84

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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.