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Finding the Fourth Proportional to 521.60, 783.60 and 367.88

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Solution

The fourth proportional to 521.60, 783.60 and 367.88 is: 552.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.60 : 783.60 = 367.88 : x
  2. Step 2: Convert to fraction form
    521.60/783.60 = 367.88/x
  3. Step 3: Cross multiply
    521.60x = 783.60 × 367.88
  4. Step 4: Simplify right side
    521.60x = 288,270.77
  5. Step 5: Solve for x
    x = 288,270.77/521.60
  6. Step 6: Final answer
    x = 552.67

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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.