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Finding the Fourth Proportional to 518.06, 776.36 and 287.05

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Solution

The fourth proportional to 518.06, 776.36 and 287.05 is: 430.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.06 : 776.36 = 287.05 : x
  2. Step 2: Convert to fraction form
    518.06/776.36 = 287.05/x
  3. Step 3: Cross multiply
    518.06x = 776.36 × 287.05
  4. Step 4: Simplify right side
    518.06x = 222,854.14
  5. Step 5: Solve for x
    x = 222,854.14/518.06
  6. Step 6: Final answer
    x = 430.17

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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.