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Finding the Fourth Proportional to 555.09, 761.06 and 545.22

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Solution

The fourth proportional to 555.09, 761.06 and 545.22 is: 747.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.09 : 761.06 = 545.22 : x
  2. Step 2: Convert to fraction form
    555.09/761.06 = 545.22/x
  3. Step 3: Cross multiply
    555.09x = 761.06 × 545.22
  4. Step 4: Simplify right side
    555.09x = 414,943.43
  5. Step 5: Solve for x
    x = 414,943.43/555.09
  6. Step 6: Final answer
    x = 747.53

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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.