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Finding the Fourth Proportional to 1,184.79, 1,777.19 and 415.11

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Solution

The fourth proportional to 1,184.79, 1,777.19 and 415.11 is: 622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.79 : 1,777.19 = 415.11 : x
  2. Step 2: Convert to fraction form
    1,184.79/1,777.19 = 415.11/x
  3. Step 3: Cross multiply
    1,184.79x = 1,777.19 × 415.11
  4. Step 4: Simplify right side
    1,184.79x = 737,729.34
  5. Step 5: Solve for x
    x = 737,729.34/1,184.79
  6. Step 6: Final answer
    x = 622.67

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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.