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Finding the Fourth Proportional to 620.01, 928.08 and 345.42

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Solution

The fourth proportional to 620.01, 928.08 and 345.42 is: 517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.01 : 928.08 = 345.42 : x
  2. Step 2: Convert to fraction form
    620.01/928.08 = 345.42/x
  3. Step 3: Cross multiply
    620.01x = 928.08 × 345.42
  4. Step 4: Simplify right side
    620.01x = 320,577.39
  5. Step 5: Solve for x
    x = 320,577.39/620.01
  6. Step 6: Final answer
    x = 517.05

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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.