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Finding the Fourth Proportional to 785.85, 1,178.51 and 555.27

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Solution

The fourth proportional to 785.85, 1,178.51 and 555.27 is: 832.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.85 : 1,178.51 = 555.27 : x
  2. Step 2: Convert to fraction form
    785.85/1,178.51 = 555.27/x
  3. Step 3: Cross multiply
    785.85x = 1,178.51 × 555.27
  4. Step 4: Simplify right side
    785.85x = 654,388.47
  5. Step 5: Solve for x
    x = 654,388.47/785.85
  6. Step 6: Final answer
    x = 832.71

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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.