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Finding the Fourth Proportional to 346.82, 478.59 and 305.06

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Solution

The fourth proportional to 346.82, 478.59 and 305.06 is: 420.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.82 : 478.59 = 305.06 : x
  2. Step 2: Convert to fraction form
    346.82/478.59 = 305.06/x
  3. Step 3: Cross multiply
    346.82x = 478.59 × 305.06
  4. Step 4: Simplify right side
    346.82x = 145,998.67
  5. Step 5: Solve for x
    x = 145,998.67/346.82
  6. Step 6: Final answer
    x = 420.96

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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.