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Finding the Fourth Proportional to 555.04, 764.40 and 484.84

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Solution

The fourth proportional to 555.04, 764.40 and 484.84 is: 667.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.04 : 764.40 = 484.84 : x
  2. Step 2: Convert to fraction form
    555.04/764.40 = 484.84/x
  3. Step 3: Cross multiply
    555.04x = 764.40 × 484.84
  4. Step 4: Simplify right side
    555.04x = 370,611.70
  5. Step 5: Solve for x
    x = 370,611.70/555.04
  6. Step 6: Final answer
    x = 667.72

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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.