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Finding the Fourth Proportional to 569.71, 786.25 and 348.78

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Solution

The fourth proportional to 569.71, 786.25 and 348.78 is: 481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.71 : 786.25 = 348.78 : x
  2. Step 2: Convert to fraction form
    569.71/786.25 = 348.78/x
  3. Step 3: Cross multiply
    569.71x = 786.25 × 348.78
  4. Step 4: Simplify right side
    569.71x = 274,228.28
  5. Step 5: Solve for x
    x = 274,228.28/569.71
  6. Step 6: Final answer
    x = 481.35

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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.