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Finding the Fourth Proportional to 577.11, 790.87 and 521.76

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Solution

The fourth proportional to 577.11, 790.87 and 521.76 is: 715.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.11 : 790.87 = 521.76 : x
  2. Step 2: Convert to fraction form
    577.11/790.87 = 521.76/x
  3. Step 3: Cross multiply
    577.11x = 790.87 × 521.76
  4. Step 4: Simplify right side
    577.11x = 412,644.33
  5. Step 5: Solve for x
    x = 412,644.33/577.11
  6. Step 6: Final answer
    x = 715.02

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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.