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Finding the Fourth Proportional to 572.13, 857.79 and 243.07

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Solution

The fourth proportional to 572.13, 857.79 and 243.07 is: 364.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.13 : 857.79 = 243.07 : x
  2. Step 2: Convert to fraction form
    572.13/857.79 = 243.07/x
  3. Step 3: Cross multiply
    572.13x = 857.79 × 243.07
  4. Step 4: Simplify right side
    572.13x = 208,500.87
  5. Step 5: Solve for x
    x = 208,500.87/572.13
  6. Step 6: Final answer
    x = 364.43

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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.