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Finding the Fourth Proportional to 657.14, 986.61 and 383.15

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Solution

The fourth proportional to 657.14, 986.61 and 383.15 is: 575.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.14 : 986.61 = 383.15 : x
  2. Step 2: Convert to fraction form
    657.14/986.61 = 383.15/x
  3. Step 3: Cross multiply
    657.14x = 986.61 × 383.15
  4. Step 4: Simplify right side
    657.14x = 378,014.69
  5. Step 5: Solve for x
    x = 378,014.69/657.14
  6. Step 6: Final answer
    x = 575.25

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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.