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Finding the Fourth Proportional to 519.64, 779.58 and 172.97

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Solution

The fourth proportional to 519.64, 779.58 and 172.97 is: 259.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.64 : 779.58 = 172.97 : x
  2. Step 2: Convert to fraction form
    519.64/779.58 = 172.97/x
  3. Step 3: Cross multiply
    519.64x = 779.58 × 172.97
  4. Step 4: Simplify right side
    519.64x = 134,844.39
  5. Step 5: Solve for x
    x = 134,844.39/519.64
  6. Step 6: Final answer
    x = 259.50

Related Problems

Find fourth proportional to 259.82, 389.79 and 86.49
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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.