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Finding the Fourth Proportional to 522.14, 783.30 and 278.60

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Solution

The fourth proportional to 522.14, 783.30 and 278.60 is: 417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.14 : 783.30 = 278.60 : x
  2. Step 2: Convert to fraction form
    522.14/783.30 = 278.60/x
  3. Step 3: Cross multiply
    522.14x = 783.30 × 278.60
  4. Step 4: Simplify right side
    522.14x = 218,227.38
  5. Step 5: Solve for x
    x = 218,227.38/522.14
  6. Step 6: Final answer
    x = 417.95

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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.