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Finding the Fourth Proportional to 346.36, 477.34 and 306.53

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Solution

The fourth proportional to 346.36, 477.34 and 306.53 is: 422.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.36 : 477.34 = 306.53 : x
  2. Step 2: Convert to fraction form
    346.36/477.34 = 306.53/x
  3. Step 3: Cross multiply
    346.36x = 477.34 × 306.53
  4. Step 4: Simplify right side
    346.36x = 146,319.03
  5. Step 5: Solve for x
    x = 146,319.03/346.36
  6. Step 6: Final answer
    x = 422.45

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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.