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Finding the Fourth Proportional to 556.36, 765.49 and 542.69

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Solution

The fourth proportional to 556.36, 765.49 and 542.69 is: 746.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.36 : 765.49 = 542.69 : x
  2. Step 2: Convert to fraction form
    556.36/765.49 = 542.69/x
  3. Step 3: Cross multiply
    556.36x = 765.49 × 542.69
  4. Step 4: Simplify right side
    556.36x = 415,424.33
  5. Step 5: Solve for x
    x = 415,424.33/556.36
  6. Step 6: Final answer
    x = 746.69

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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.