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Finding the Fourth Proportional to 3,613, 4,985.96 and 1,957

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Solution

The fourth proportional to 3,613, 4,985.96 and 1,957 is: 2,700.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613 : 4,985.96 = 1,957 : x
  2. Step 2: Convert to fraction form
    3,613/4,985.96 = 1,957/x
  3. Step 3: Cross multiply
    3,613x = 4,985.96 × 1,957
  4. Step 4: Simplify right side
    3,613x = 9,757,523.72
  5. Step 5: Solve for x
    x = 9,757,523.72/3,613
  6. Step 6: Final answer
    x = 2,700.67

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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.