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Finding the Fourth Proportional to 553.31, 763.55 and 304.63

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Solution

The fourth proportional to 553.31, 763.55 and 304.63 is: 420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.31 : 763.55 = 304.63 : x
  2. Step 2: Convert to fraction form
    553.31/763.55 = 304.63/x
  3. Step 3: Cross multiply
    553.31x = 763.55 × 304.63
  4. Step 4: Simplify right side
    553.31x = 232,600.24
  5. Step 5: Solve for x
    x = 232,600.24/553.31
  6. Step 6: Final answer
    x = 420.38

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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.