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Finding the Fourth Proportional to 569.88, 855.06 and 339.21

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Solution

The fourth proportional to 569.88, 855.06 and 339.21 is: 508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.88 : 855.06 = 339.21 : x
  2. Step 2: Convert to fraction form
    569.88/855.06 = 339.21/x
  3. Step 3: Cross multiply
    569.88x = 855.06 × 339.21
  4. Step 4: Simplify right side
    569.88x = 290,044.90
  5. Step 5: Solve for x
    x = 290,044.90/569.88
  6. Step 6: Final answer
    x = 508.96

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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.