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Finding the Fourth Proportional to 646.62, 892.83 and 528.72

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Solution

The fourth proportional to 646.62, 892.83 and 528.72 is: 730.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.62 : 892.83 = 528.72 : x
  2. Step 2: Convert to fraction form
    646.62/892.83 = 528.72/x
  3. Step 3: Cross multiply
    646.62x = 892.83 × 528.72
  4. Step 4: Simplify right side
    646.62x = 472,057.08
  5. Step 5: Solve for x
    x = 472,057.08/646.62
  6. Step 6: Final answer
    x = 730.04

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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.