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Finding the Fourth Proportional to 1,462.01, 2,191.75 and 639.66

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Solution

The fourth proportional to 1,462.01, 2,191.75 and 639.66 is: 958.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,462.01 : 2,191.75 = 639.66 : x
  2. Step 2: Convert to fraction form
    1,462.01/2,191.75 = 639.66/x
  3. Step 3: Cross multiply
    1,462.01x = 2,191.75 × 639.66
  4. Step 4: Simplify right side
    1,462.01x = 1,401,973.21
  5. Step 5: Solve for x
    x = 1,401,973.21/1,462.01
  6. Step 6: Final answer
    x = 958.93

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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.