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Finding the Fourth Proportional to 713.86, 984.75 and 492.43

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Solution

The fourth proportional to 713.86, 984.75 and 492.43 is: 679.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.86 : 984.75 = 492.43 : x
  2. Step 2: Convert to fraction form
    713.86/984.75 = 492.43/x
  3. Step 3: Cross multiply
    713.86x = 984.75 × 492.43
  4. Step 4: Simplify right side
    713.86x = 484,920.44
  5. Step 5: Solve for x
    x = 484,920.44/713.86
  6. Step 6: Final answer
    x = 679.29

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.