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Finding the Fourth Proportional to 657.81, 985.79 and 332.79

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Solution

The fourth proportional to 657.81, 985.79 and 332.79 is: 498.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.81 : 985.79 = 332.79 : x
  2. Step 2: Convert to fraction form
    657.81/985.79 = 332.79/x
  3. Step 3: Cross multiply
    657.81x = 985.79 × 332.79
  4. Step 4: Simplify right side
    657.81x = 328,061.05
  5. Step 5: Solve for x
    x = 328,061.05/657.81
  6. Step 6: Final answer
    x = 498.72

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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.