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Finding the Fourth Proportional to 646.79, 892.76 and 450.36

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Solution

The fourth proportional to 646.79, 892.76 and 450.36 is: 621.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.79 : 892.76 = 450.36 : x
  2. Step 2: Convert to fraction form
    646.79/892.76 = 450.36/x
  3. Step 3: Cross multiply
    646.79x = 892.76 × 450.36
  4. Step 4: Simplify right side
    646.79x = 402,061.14
  5. Step 5: Solve for x
    x = 402,061.14/646.79
  6. Step 6: Final answer
    x = 621.63

Related Problems

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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.