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Finding the Fourth Proportional to 657.50, 985.68 and 383.49

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Solution

The fourth proportional to 657.50, 985.68 and 383.49 is: 574.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.50 : 985.68 = 383.49 : x
  2. Step 2: Convert to fraction form
    657.50/985.68 = 383.49/x
  3. Step 3: Cross multiply
    657.50x = 985.68 × 383.49
  4. Step 4: Simplify right side
    657.50x = 377,998.42
  5. Step 5: Solve for x
    x = 377,998.42/657.50
  6. Step 6: Final answer
    x = 574.91

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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.