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Finding the Fourth Proportional to 555.26, 761.67 and 550.40

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Solution

The fourth proportional to 555.26, 761.67 and 550.40 is: 755.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.26 : 761.67 = 550.40 : x
  2. Step 2: Convert to fraction form
    555.26/761.67 = 550.40/x
  3. Step 3: Cross multiply
    555.26x = 761.67 × 550.40
  4. Step 4: Simplify right side
    555.26x = 419,219.36
  5. Step 5: Solve for x
    x = 419,219.36/555.26
  6. Step 6: Final answer
    x = 755.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.