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Finding the Fourth Proportional to 522.87, 783.90 and 279.47

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Solution

The fourth proportional to 522.87, 783.90 and 279.47 is: 418.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.87 : 783.90 = 279.47 : x
  2. Step 2: Convert to fraction form
    522.87/783.90 = 279.47/x
  3. Step 3: Cross multiply
    522.87x = 783.90 × 279.47
  4. Step 4: Simplify right side
    522.87x = 219,072.61
  5. Step 5: Solve for x
    x = 219,072.61/522.87
  6. Step 6: Final answer
    x = 418.98

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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.