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Finding the Fourth Proportional to 518.76, 778.36 and 259.02

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Solution

The fourth proportional to 518.76, 778.36 and 259.02 is: 388.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.76 : 778.36 = 259.02 : x
  2. Step 2: Convert to fraction form
    518.76/778.36 = 259.02/x
  3. Step 3: Cross multiply
    518.76x = 778.36 × 259.02
  4. Step 4: Simplify right side
    518.76x = 201,610.81
  5. Step 5: Solve for x
    x = 201,610.81/518.76
  6. Step 6: Final answer
    x = 388.64

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