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Finding the Fourth Proportional to 553.13, 763.91 and 346.25

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Solution

The fourth proportional to 553.13, 763.91 and 346.25 is: 478.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.13 : 763.91 = 346.25 : x
  2. Step 2: Convert to fraction form
    553.13/763.91 = 346.25/x
  3. Step 3: Cross multiply
    553.13x = 763.91 × 346.25
  4. Step 4: Simplify right side
    553.13x = 264,503.84
  5. Step 5: Solve for x
    x = 264,503.84/553.13
  6. Step 6: Final answer
    x = 478.19

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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.