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Finding the Fourth Proportional to 618.81, 929.60 and 528.60

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Solution

The fourth proportional to 618.81, 929.60 and 528.60 is: 794.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.81 : 929.60 = 528.60 : x
  2. Step 2: Convert to fraction form
    618.81/929.60 = 528.60/x
  3. Step 3: Cross multiply
    618.81x = 929.60 × 528.60
  4. Step 4: Simplify right side
    618.81x = 491,383.92
  5. Step 5: Solve for x
    x = 491,383.92/618.81
  6. Step 6: Final answer
    x = 794.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.