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Finding the Fourth Proportional to 785.90, 1,084.51 and 454.27

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Solution

The fourth proportional to 785.90, 1,084.51 and 454.27 is: 626.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.90 : 1,084.51 = 454.27 : x
  2. Step 2: Convert to fraction form
    785.90/1,084.51 = 454.27/x
  3. Step 3: Cross multiply
    785.90x = 1,084.51 × 454.27
  4. Step 4: Simplify right side
    785.90x = 492,660.36
  5. Step 5: Solve for x
    x = 492,660.36/785.90
  6. Step 6: Final answer
    x = 626.87

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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.