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Finding the Fourth Proportional to 556.58, 768.81 and 427.18

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Solution

The fourth proportional to 556.58, 768.81 and 427.18 is: 590.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.58 : 768.81 = 427.18 : x
  2. Step 2: Convert to fraction form
    556.58/768.81 = 427.18/x
  3. Step 3: Cross multiply
    556.58x = 768.81 × 427.18
  4. Step 4: Simplify right side
    556.58x = 328,420.26
  5. Step 5: Solve for x
    x = 328,420.26/556.58
  6. Step 6: Final answer
    x = 590.07

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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.