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Finding the Fourth Proportional to 663.02, 913.71 and 646.82

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Solution

The fourth proportional to 663.02, 913.71 and 646.82 is: 891.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.02 : 913.71 = 646.82 : x
  2. Step 2: Convert to fraction form
    663.02/913.71 = 646.82/x
  3. Step 3: Cross multiply
    663.02x = 913.71 × 646.82
  4. Step 4: Simplify right side
    663.02x = 591,005.90
  5. Step 5: Solve for x
    x = 591,005.90/663.02
  6. Step 6: Final answer
    x = 891.38

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Double scale
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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.