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Finding the Fourth Proportional to 785.15, 1,082.64 and 536.61

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Solution

The fourth proportional to 785.15, 1,082.64 and 536.61 is: 739.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.15 : 1,082.64 = 536.61 : x
  2. Step 2: Convert to fraction form
    785.15/1,082.64 = 536.61/x
  3. Step 3: Cross multiply
    785.15x = 1,082.64 × 536.61
  4. Step 4: Simplify right side
    785.15x = 580,955.45
  5. Step 5: Solve for x
    x = 580,955.45/785.15
  6. Step 6: Final answer
    x = 739.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.