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Finding the Fourth Proportional to 345.81, 474.09 and 339.68

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Solution

The fourth proportional to 345.81, 474.09 and 339.68 is: 465.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.81 : 474.09 = 339.68 : x
  2. Step 2: Convert to fraction form
    345.81/474.09 = 339.68/x
  3. Step 3: Cross multiply
    345.81x = 474.09 × 339.68
  4. Step 4: Simplify right side
    345.81x = 161,036.52
  5. Step 5: Solve for x
    x = 161,036.52/345.81
  6. Step 6: Final answer
    x = 465.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.