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Finding the Fourth Proportional to 556.54, 768.48 and 555.32

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Solution

The fourth proportional to 556.54, 768.48 and 555.32 is: 766.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.54 : 768.48 = 555.32 : x
  2. Step 2: Convert to fraction form
    556.54/768.48 = 555.32/x
  3. Step 3: Cross multiply
    556.54x = 768.48 × 555.32
  4. Step 4: Simplify right side
    556.54x = 426,752.31
  5. Step 5: Solve for x
    x = 426,752.31/556.54
  6. Step 6: Final answer
    x = 766.80

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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.