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Finding the Fourth Proportional to 569.68, 853.66 and 386.44

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Solution

The fourth proportional to 569.68, 853.66 and 386.44 is: 579.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.68 : 853.66 = 386.44 : x
  2. Step 2: Convert to fraction form
    569.68/853.66 = 386.44/x
  3. Step 3: Cross multiply
    569.68x = 853.66 × 386.44
  4. Step 4: Simplify right side
    569.68x = 329,888.37
  5. Step 5: Solve for x
    x = 329,888.37/569.68
  6. Step 6: Final answer
    x = 579.08

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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.