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Finding the Fourth Proportional to 569.56, 785.98 and 320.84

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Solution

The fourth proportional to 569.56, 785.98 and 320.84 is: 442.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.56 : 785.98 = 320.84 : x
  2. Step 2: Convert to fraction form
    569.56/785.98 = 320.84/x
  3. Step 3: Cross multiply
    569.56x = 785.98 × 320.84
  4. Step 4: Simplify right side
    569.56x = 252,170.13
  5. Step 5: Solve for x
    x = 252,170.13/569.56
  6. Step 6: Final answer
    x = 442.75

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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.