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Finding the Fourth Proportional to 785.34, 1,083.01 and 470.55

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Solution

The fourth proportional to 785.34, 1,083.01 and 470.55 is: 648.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.34 : 1,083.01 = 470.55 : x
  2. Step 2: Convert to fraction form
    785.34/1,083.01 = 470.55/x
  3. Step 3: Cross multiply
    785.34x = 1,083.01 × 470.55
  4. Step 4: Simplify right side
    785.34x = 509,610.36
  5. Step 5: Solve for x
    x = 509,610.36/785.34
  6. Step 6: Final answer
    x = 648.90

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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.