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Finding the Fourth Proportional to 665.50, 998.76 and 340.84

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Solution

The fourth proportional to 665.50, 998.76 and 340.84 is: 511.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.50 : 998.76 = 340.84 : x
  2. Step 2: Convert to fraction form
    665.50/998.76 = 340.84/x
  3. Step 3: Cross multiply
    665.50x = 998.76 × 340.84
  4. Step 4: Simplify right side
    665.50x = 340,417.36
  5. Step 5: Solve for x
    x = 340,417.36/665.50
  6. Step 6: Final answer
    x = 511.52

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.