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Finding the Fourth Proportional to 373.32, 513.45 and 306.45

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Solution

The fourth proportional to 373.32, 513.45 and 306.45 is: 421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.32 : 513.45 = 306.45 : x
  2. Step 2: Convert to fraction form
    373.32/513.45 = 306.45/x
  3. Step 3: Cross multiply
    373.32x = 513.45 × 306.45
  4. Step 4: Simplify right side
    373.32x = 157,346.75
  5. Step 5: Solve for x
    x = 157,346.75/373.32
  6. Step 6: Final answer
    x = 421.48

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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.