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Finding the Fourth Proportional to 785.22, 1,177.02 and 476.22

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Solution

The fourth proportional to 785.22, 1,177.02 and 476.22 is: 713.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.22 : 1,177.02 = 476.22 : x
  2. Step 2: Convert to fraction form
    785.22/1,177.02 = 476.22/x
  3. Step 3: Cross multiply
    785.22x = 1,177.02 × 476.22
  4. Step 4: Simplify right side
    785.22x = 560,520.46
  5. Step 5: Solve for x
    x = 560,520.46/785.22
  6. Step 6: Final answer
    x = 713.84

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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.