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Finding the Fourth Proportional to 346.42, 477.93 and 215.47

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Solution

The fourth proportional to 346.42, 477.93 and 215.47 is: 297.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.42 : 477.93 = 215.47 : x
  2. Step 2: Convert to fraction form
    346.42/477.93 = 215.47/x
  3. Step 3: Cross multiply
    346.42x = 477.93 × 215.47
  4. Step 4: Simplify right side
    346.42x = 102,979.58
  5. Step 5: Solve for x
    x = 102,979.58/346.42
  6. Step 6: Final answer
    x = 297.27

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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.