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Finding the Fourth Proportional to 342.32, 472.14 and 290.34

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Solution

The fourth proportional to 342.32, 472.14 and 290.34 is: 400.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.32 : 472.14 = 290.34 : x
  2. Step 2: Convert to fraction form
    342.32/472.14 = 290.34/x
  3. Step 3: Cross multiply
    342.32x = 472.14 × 290.34
  4. Step 4: Simplify right side
    342.32x = 137,081.13
  5. Step 5: Solve for x
    x = 137,081.13/342.32
  6. Step 6: Final answer
    x = 400.45

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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.