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Finding the Fourth Proportional to 401.49, 554.04 and 283.64

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Solution

The fourth proportional to 401.49, 554.04 and 283.64 is: 391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.49 : 554.04 = 283.64 : x
  2. Step 2: Convert to fraction form
    401.49/554.04 = 283.64/x
  3. Step 3: Cross multiply
    401.49x = 554.04 × 283.64
  4. Step 4: Simplify right side
    401.49x = 157,145.14
  5. Step 5: Solve for x
    x = 157,145.14/401.49
  6. Step 6: Final answer
    x = 391.40

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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.