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Finding the Fourth Proportional to 569.60, 788.64 and 540.80

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Solution

The fourth proportional to 569.60, 788.64 and 540.80 is: 748.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.60 : 788.64 = 540.80 : x
  2. Step 2: Convert to fraction form
    569.60/788.64 = 540.80/x
  3. Step 3: Cross multiply
    569.60x = 788.64 × 540.80
  4. Step 4: Simplify right side
    569.60x = 426,496.51
  5. Step 5: Solve for x
    x = 426,496.51/569.60
  6. Step 6: Final answer
    x = 748.76

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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.