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Finding the Fourth Proportional to 553.79, 763.12 and 465.12

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Solution

The fourth proportional to 553.79, 763.12 and 465.12 is: 640.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.79 : 763.12 = 465.12 : x
  2. Step 2: Convert to fraction form
    553.79/763.12 = 465.12/x
  3. Step 3: Cross multiply
    553.79x = 763.12 × 465.12
  4. Step 4: Simplify right side
    553.79x = 354,942.96
  5. Step 5: Solve for x
    x = 354,942.96/553.79
  6. Step 6: Final answer
    x = 640.93

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.