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Finding the Fourth Proportional to 713.49, 984.55 and 492.45

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Solution

The fourth proportional to 713.49, 984.55 and 492.45 is: 679.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.49 : 984.55 = 492.45 : x
  2. Step 2: Convert to fraction form
    713.49/984.55 = 492.45/x
  3. Step 3: Cross multiply
    713.49x = 984.55 × 492.45
  4. Step 4: Simplify right side
    713.49x = 484,841.65
  5. Step 5: Solve for x
    x = 484,841.65/713.49
  6. Step 6: Final answer
    x = 679.54

Related Problems

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Half scale
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Double scale
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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.