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Finding the Fourth Proportional to 713.54, 983.94 and 492.83

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Solution

The fourth proportional to 713.54, 983.94 and 492.83 is: 679.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.54 : 983.94 = 492.83 : x
  2. Step 2: Convert to fraction form
    713.54/983.94 = 492.83/x
  3. Step 3: Cross multiply
    713.54x = 983.94 × 492.83
  4. Step 4: Simplify right side
    713.54x = 484,915.15
  5. Step 5: Solve for x
    x = 484,915.15/713.54
  6. Step 6: Final answer
    x = 679.59

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1.5x scale

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.