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Finding the Fourth Proportional to 528.93, 729.14 and 381.33

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Solution

The fourth proportional to 528.93, 729.14 and 381.33 is: 525.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.93 : 729.14 = 381.33 : x
  2. Step 2: Convert to fraction form
    528.93/729.14 = 381.33/x
  3. Step 3: Cross multiply
    528.93x = 729.14 × 381.33
  4. Step 4: Simplify right side
    528.93x = 278,041.05
  5. Step 5: Solve for x
    x = 278,041.05/528.93
  6. Step 6: Final answer
    x = 525.67

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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.