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Finding the Fourth Proportional to 555.34, 761.39 and 545.46

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Solution

The fourth proportional to 555.34, 761.39 and 545.46 is: 747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.34 : 761.39 = 545.46 : x
  2. Step 2: Convert to fraction form
    555.34/761.39 = 545.46/x
  3. Step 3: Cross multiply
    555.34x = 761.39 × 545.46
  4. Step 4: Simplify right side
    555.34x = 415,307.79
  5. Step 5: Solve for x
    x = 415,307.79/555.34
  6. Step 6: Final answer
    x = 747.84

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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.