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Finding the Fourth Proportional to 556.83, 768.72 and 347.19

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Solution

The fourth proportional to 556.83, 768.72 and 347.19 is: 479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.83 : 768.72 = 347.19 : x
  2. Step 2: Convert to fraction form
    556.83/768.72 = 347.19/x
  3. Step 3: Cross multiply
    556.83x = 768.72 × 347.19
  4. Step 4: Simplify right side
    556.83x = 266,891.90
  5. Step 5: Solve for x
    x = 266,891.90/556.83
  6. Step 6: Final answer
    x = 479.31

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.