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Finding the Fourth Proportional to 401.34, 554.13 and 313.86

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Solution

The fourth proportional to 401.34, 554.13 and 313.86 is: 433.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.34 : 554.13 = 313.86 : x
  2. Step 2: Convert to fraction form
    401.34/554.13 = 313.86/x
  3. Step 3: Cross multiply
    401.34x = 554.13 × 313.86
  4. Step 4: Simplify right side
    401.34x = 173,919.24
  5. Step 5: Solve for x
    x = 173,919.24/401.34
  6. Step 6: Final answer
    x = 433.35

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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.