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Finding the Fourth Proportional to 521.80, 783.39 and 367.80

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Solution

The fourth proportional to 521.80, 783.39 and 367.80 is: 552.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.80 : 783.39 = 367.80 : x
  2. Step 2: Convert to fraction form
    521.80/783.39 = 367.80/x
  3. Step 3: Cross multiply
    521.80x = 783.39 × 367.80
  4. Step 4: Simplify right side
    521.80x = 288,130.84
  5. Step 5: Solve for x
    x = 288,130.84/521.80
  6. Step 6: Final answer
    x = 552.19

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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.