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Finding the Fourth Proportional to 346.21, 521.19 and 316.45

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Solution

The fourth proportional to 346.21, 521.19 and 316.45 is: 476.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.21 : 521.19 = 316.45 : x
  2. Step 2: Convert to fraction form
    346.21/521.19 = 316.45/x
  3. Step 3: Cross multiply
    346.21x = 521.19 × 316.45
  4. Step 4: Simplify right side
    346.21x = 164,930.58
  5. Step 5: Solve for x
    x = 164,930.58/346.21
  6. Step 6: Final answer
    x = 476.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.