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Finding the Fourth Proportional to 556.55, 766.92 and 517.63

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Solution

The fourth proportional to 556.55, 766.92 and 517.63 is: 713.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.55 : 766.92 = 517.63 : x
  2. Step 2: Convert to fraction form
    556.55/766.92 = 517.63/x
  3. Step 3: Cross multiply
    556.55x = 766.92 × 517.63
  4. Step 4: Simplify right side
    556.55x = 396,981.51
  5. Step 5: Solve for x
    x = 396,981.51/556.55
  6. Step 6: Final answer
    x = 713.28

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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.