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Finding the Fourth Proportional to 785.86, 1,179.17 and 556.22

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Solution

The fourth proportional to 785.86, 1,179.17 and 556.22 is: 834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.86 : 1,179.17 = 556.22 : x
  2. Step 2: Convert to fraction form
    785.86/1,179.17 = 556.22/x
  3. Step 3: Cross multiply
    785.86x = 1,179.17 × 556.22
  4. Step 4: Simplify right side
    785.86x = 655,877.94
  5. Step 5: Solve for x
    x = 655,877.94/785.86
  6. Step 6: Final answer
    x = 834.60

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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.