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Finding the Fourth Proportional to 780.16, 1,076.48 and 573.44

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Solution

The fourth proportional to 780.16, 1,076.48 and 573.44 is: 791.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.16 : 1,076.48 = 573.44 : x
  2. Step 2: Convert to fraction form
    780.16/1,076.48 = 573.44/x
  3. Step 3: Cross multiply
    780.16x = 1,076.48 × 573.44
  4. Step 4: Simplify right side
    780.16x = 617,296.69
  5. Step 5: Solve for x
    x = 617,296.69/780.16
  6. Step 6: Final answer
    x = 791.24

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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.