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Finding the Fourth Proportional to 346.99, 478.94 and 215.92

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Solution

The fourth proportional to 346.99, 478.94 and 215.92 is: 298.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.99 : 478.94 = 215.92 : x
  2. Step 2: Convert to fraction form
    346.99/478.94 = 215.92/x
  3. Step 3: Cross multiply
    346.99x = 478.94 × 215.92
  4. Step 4: Simplify right side
    346.99x = 103,412.72
  5. Step 5: Solve for x
    x = 103,412.72/346.99
  6. Step 6: Final answer
    x = 298.03

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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.