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Finding the Fourth Proportional to 553.58, 763.93 and 304.90

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Solution

The fourth proportional to 553.58, 763.93 and 304.90 is: 420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.58 : 763.93 = 304.90 : x
  2. Step 2: Convert to fraction form
    553.58/763.93 = 304.90/x
  3. Step 3: Cross multiply
    553.58x = 763.93 × 304.90
  4. Step 4: Simplify right side
    553.58x = 232,920.35
  5. Step 5: Solve for x
    x = 232,920.35/553.58
  6. Step 6: Final answer
    x = 420.75

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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.