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Finding the Fourth Proportional to 569.52, 785.04 and 421.92

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Solution

The fourth proportional to 569.52, 785.04 and 421.92 is: 581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.52 : 785.04 = 421.92 : x
  2. Step 2: Convert to fraction form
    569.52/785.04 = 421.92/x
  3. Step 3: Cross multiply
    569.52x = 785.04 × 421.92
  4. Step 4: Simplify right side
    569.52x = 331,224.08
  5. Step 5: Solve for x
    x = 331,224.08/569.52
  6. Step 6: Final answer
    x = 581.58

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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.