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Finding the Fourth Proportional to 577.02, 796.04 and 390.45

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Solution

The fourth proportional to 577.02, 796.04 and 390.45 is: 538.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.02 : 796.04 = 390.45 : x
  2. Step 2: Convert to fraction form
    577.02/796.04 = 390.45/x
  3. Step 3: Cross multiply
    577.02x = 796.04 × 390.45
  4. Step 4: Simplify right side
    577.02x = 310,813.82
  5. Step 5: Solve for x
    x = 310,813.82/577.02
  6. Step 6: Final answer
    x = 538.65

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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.