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Finding the Fourth Proportional to 785.31, 1,083.73 and 436

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Solution

The fourth proportional to 785.31, 1,083.73 and 436 is: 601.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.31 : 1,083.73 = 436 : x
  2. Step 2: Convert to fraction form
    785.31/1,083.73 = 436/x
  3. Step 3: Cross multiply
    785.31x = 1,083.73 × 436
  4. Step 4: Simplify right side
    785.31x = 472,506.28
  5. Step 5: Solve for x
    x = 472,506.28/785.31
  6. Step 6: Final answer
    x = 601.68

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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.