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Finding the Fourth Proportional to 553.62, 763.89 and 346.50

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Solution

The fourth proportional to 553.62, 763.89 and 346.50 is: 478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.62 : 763.89 = 346.50 : x
  2. Step 2: Convert to fraction form
    553.62/763.89 = 346.50/x
  3. Step 3: Cross multiply
    553.62x = 763.89 × 346.50
  4. Step 4: Simplify right side
    553.62x = 264,687.89
  5. Step 5: Solve for x
    x = 264,687.89/553.62
  6. Step 6: Final answer
    x = 478.10

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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.