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Finding the Fourth Proportional to 646.35, 892.16 and 613.28

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Solution

The fourth proportional to 646.35, 892.16 and 613.28 is: 846.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.35 : 892.16 = 613.28 : x
  2. Step 2: Convert to fraction form
    646.35/892.16 = 613.28/x
  3. Step 3: Cross multiply
    646.35x = 892.16 × 613.28
  4. Step 4: Simplify right side
    646.35x = 547,140.82
  5. Step 5: Solve for x
    x = 547,140.82/646.35
  6. Step 6: Final answer
    x = 846.52

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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.