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Finding the Fourth Proportional to 555.06, 765.69 and 450.26

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Solution

The fourth proportional to 555.06, 765.69 and 450.26 is: 621.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.06 : 765.69 = 450.26 : x
  2. Step 2: Convert to fraction form
    555.06/765.69 = 450.26/x
  3. Step 3: Cross multiply
    555.06x = 765.69 × 450.26
  4. Step 4: Simplify right side
    555.06x = 344,762.62
  5. Step 5: Solve for x
    x = 344,762.62/555.06
  6. Step 6: Final answer
    x = 621.13

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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.