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Finding the Fourth Proportional to 693.45, 958.18 and 554.71

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Solution

The fourth proportional to 693.45, 958.18 and 554.71 is: 766.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.45 : 958.18 = 554.71 : x
  2. Step 2: Convert to fraction form
    693.45/958.18 = 554.71/x
  3. Step 3: Cross multiply
    693.45x = 958.18 × 554.71
  4. Step 4: Simplify right side
    693.45x = 531,512.03
  5. Step 5: Solve for x
    x = 531,512.03/693.45
  6. Step 6: Final answer
    x = 766.47

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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.