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Finding the Fourth Proportional to 336.51, 505.58 and 215.01

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Solution

The fourth proportional to 336.51, 505.58 and 215.01 is: 323.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.51 : 505.58 = 215.01 : x
  2. Step 2: Convert to fraction form
    336.51/505.58 = 215.01/x
  3. Step 3: Cross multiply
    336.51x = 505.58 × 215.01
  4. Step 4: Simplify right side
    336.51x = 108,703.68
  5. Step 5: Solve for x
    x = 108,703.68/336.51
  6. Step 6: Final answer
    x = 323.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.