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Finding the Fourth Proportional to 569.12, 785.26 and 347.68

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Solution

The fourth proportional to 569.12, 785.26 and 347.68 is: 479.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.12 : 785.26 = 347.68 : x
  2. Step 2: Convert to fraction form
    569.12/785.26 = 347.68/x
  3. Step 3: Cross multiply
    569.12x = 785.26 × 347.68
  4. Step 4: Simplify right side
    569.12x = 273,019.20
  5. Step 5: Solve for x
    x = 273,019.20/569.12
  6. Step 6: Final answer
    x = 479.72

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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.