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Finding the Fourth Proportional to 556.79, 768.83 and 555.57

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Solution

The fourth proportional to 556.79, 768.83 and 555.57 is: 767.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.79 : 768.83 = 555.57 : x
  2. Step 2: Convert to fraction form
    556.79/768.83 = 555.57/x
  3. Step 3: Cross multiply
    556.79x = 768.83 × 555.57
  4. Step 4: Simplify right side
    556.79x = 427,136.11
  5. Step 5: Solve for x
    x = 427,136.11/556.79
  6. Step 6: Final answer
    x = 767.15

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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.