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Finding the Fourth Proportional to 577.02, 864.60 and 393.78

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Solution

The fourth proportional to 577.02, 864.60 and 393.78 is: 590.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.02 : 864.60 = 393.78 : x
  2. Step 2: Convert to fraction form
    577.02/864.60 = 393.78/x
  3. Step 3: Cross multiply
    577.02x = 864.60 × 393.78
  4. Step 4: Simplify right side
    577.02x = 340,462.19
  5. Step 5: Solve for x
    x = 340,462.19/577.02
  6. Step 6: Final answer
    x = 590.04

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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.