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Finding the Fourth Proportional to 646.86, 968.99 and 299.72

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Solution

The fourth proportional to 646.86, 968.99 and 299.72 is: 448.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.86 : 968.99 = 299.72 : x
  2. Step 2: Convert to fraction form
    646.86/968.99 = 299.72/x
  3. Step 3: Cross multiply
    646.86x = 968.99 × 299.72
  4. Step 4: Simplify right side
    646.86x = 290,419.34
  5. Step 5: Solve for x
    x = 290,419.34/646.86
  6. Step 6: Final answer
    x = 448.97

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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.