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Finding the Fourth Proportional to 661.43, 912.76 and 362.68

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Solution

The fourth proportional to 661.43, 912.76 and 362.68 is: 500.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.43 : 912.76 = 362.68 : x
  2. Step 2: Convert to fraction form
    661.43/912.76 = 362.68/x
  3. Step 3: Cross multiply
    661.43x = 912.76 × 362.68
  4. Step 4: Simplify right side
    661.43x = 331,036.61
  5. Step 5: Solve for x
    x = 331,036.61/661.43
  6. Step 6: Final answer
    x = 500.48

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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.