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Finding the Fourth Proportional to 421.08, 577.94 and 373.39

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Solution

The fourth proportional to 421.08, 577.94 and 373.39 is: 512.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.08 : 577.94 = 373.39 : x
  2. Step 2: Convert to fraction form
    421.08/577.94 = 373.39/x
  3. Step 3: Cross multiply
    421.08x = 577.94 × 373.39
  4. Step 4: Simplify right side
    421.08x = 215,797.02
  5. Step 5: Solve for x
    x = 215,797.02/421.08
  6. Step 6: Final answer
    x = 512.48

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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.