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Finding the Fourth Proportional to 401.93, 555.15 and 291.23

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Solution

The fourth proportional to 401.93, 555.15 and 291.23 is: 402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.93 : 555.15 = 291.23 : x
  2. Step 2: Convert to fraction form
    401.93/555.15 = 291.23/x
  3. Step 3: Cross multiply
    401.93x = 555.15 × 291.23
  4. Step 4: Simplify right side
    401.93x = 161,676.73
  5. Step 5: Solve for x
    x = 161,676.73/401.93
  6. Step 6: Final answer
    x = 402.25

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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.