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Finding the Fourth Proportional to 941.99, 1,412.96 and 421.85

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Solution

The fourth proportional to 941.99, 1,412.96 and 421.85 is: 632.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.99 : 1,412.96 = 421.85 : x
  2. Step 2: Convert to fraction form
    941.99/1,412.96 = 421.85/x
  3. Step 3: Cross multiply
    941.99x = 1,412.96 × 421.85
  4. Step 4: Simplify right side
    941.99x = 596,048.00
  5. Step 5: Solve for x
    x = 596,048.00/941.99
  6. Step 6: Final answer
    x = 632.76

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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.