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Finding the Fourth Proportional to 577.99, 867.21 and 253.45

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Solution

The fourth proportional to 577.99, 867.21 and 253.45 is: 380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.99 : 867.21 = 253.45 : x
  2. Step 2: Convert to fraction form
    577.99/867.21 = 253.45/x
  3. Step 3: Cross multiply
    577.99x = 867.21 × 253.45
  4. Step 4: Simplify right side
    577.99x = 219,794.37
  5. Step 5: Solve for x
    x = 219,794.37/577.99
  6. Step 6: Final answer
    x = 380.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.