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Finding the Fourth Proportional to 519.51, 779.28 and 417.45

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Solution

The fourth proportional to 519.51, 779.28 and 417.45 is: 626.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.51 : 779.28 = 417.45 : x
  2. Step 2: Convert to fraction form
    519.51/779.28 = 417.45/x
  3. Step 3: Cross multiply
    519.51x = 779.28 × 417.45
  4. Step 4: Simplify right side
    519.51x = 325,310.44
  5. Step 5: Solve for x
    x = 325,310.44/519.51
  6. Step 6: Final answer
    x = 626.19

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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.