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Finding the Fourth Proportional to 569.63, 786.72 and 393.08

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Solution

The fourth proportional to 569.63, 786.72 and 393.08 is: 542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.63 : 786.72 = 393.08 : x
  2. Step 2: Convert to fraction form
    569.63/786.72 = 393.08/x
  3. Step 3: Cross multiply
    569.63x = 786.72 × 393.08
  4. Step 4: Simplify right side
    569.63x = 309,239.96
  5. Step 5: Solve for x
    x = 309,239.96/569.63
  6. Step 6: Final answer
    x = 542.88

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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.