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Finding the Fourth Proportional to 418.49, 623.49 and 397.84

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Solution

The fourth proportional to 418.49, 623.49 and 397.84 is: 592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.49 : 623.49 = 397.84 : x
  2. Step 2: Convert to fraction form
    418.49/623.49 = 397.84/x
  3. Step 3: Cross multiply
    418.49x = 623.49 × 397.84
  4. Step 4: Simplify right side
    418.49x = 248,046.14
  5. Step 5: Solve for x
    x = 248,046.14/418.49
  6. Step 6: Final answer
    x = 592.72

Related Problems

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.