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Finding the Fourth Proportional to 401.51, 554.16 and 275.64

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Solution

The fourth proportional to 401.51, 554.16 and 275.64 is: 380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.51 : 554.16 = 275.64 : x
  2. Step 2: Convert to fraction form
    401.51/554.16 = 275.64/x
  3. Step 3: Cross multiply
    401.51x = 554.16 × 275.64
  4. Step 4: Simplify right side
    401.51x = 152,748.66
  5. Step 5: Solve for x
    x = 152,748.66/401.51
  6. Step 6: Final answer
    x = 380.44

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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.