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Finding the Fourth Proportional to 555.66, 761.83 and 545.78

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Solution

The fourth proportional to 555.66, 761.83 and 545.78 is: 748.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.66 : 761.83 = 545.78 : x
  2. Step 2: Convert to fraction form
    555.66/761.83 = 545.78/x
  3. Step 3: Cross multiply
    555.66x = 761.83 × 545.78
  4. Step 4: Simplify right side
    555.66x = 415,792.12
  5. Step 5: Solve for x
    x = 415,792.12/555.66
  6. Step 6: Final answer
    x = 748.29

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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.