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Finding the Fourth Proportional to 553, 763.13 and 316.96

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Solution

The fourth proportional to 553, 763.13 and 316.96 is: 437.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553 : 763.13 = 316.96 : x
  2. Step 2: Convert to fraction form
    553/763.13 = 316.96/x
  3. Step 3: Cross multiply
    553x = 763.13 × 316.96
  4. Step 4: Simplify right side
    553x = 241,881.68
  5. Step 5: Solve for x
    x = 241,881.68/553
  6. Step 6: Final answer
    x = 437.40

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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.