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Finding the Fourth Proportional to 569.57, 786.20 and 513.21

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Solution

The fourth proportional to 569.57, 786.20 and 513.21 is: 708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.57 : 786.20 = 513.21 : x
  2. Step 2: Convert to fraction form
    569.57/786.20 = 513.21/x
  3. Step 3: Cross multiply
    569.57x = 786.20 × 513.21
  4. Step 4: Simplify right side
    569.57x = 403,483.14
  5. Step 5: Solve for x
    x = 403,483.14/569.57
  6. Step 6: Final answer
    x = 708.40

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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.