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Finding the Fourth Proportional to 1,043.15, 1,563.98 and 522.78

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Solution

The fourth proportional to 1,043.15, 1,563.98 and 522.78 is: 783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.15 : 1,563.98 = 522.78 : x
  2. Step 2: Convert to fraction form
    1,043.15/1,563.98 = 522.78/x
  3. Step 3: Cross multiply
    1,043.15x = 1,563.98 × 522.78
  4. Step 4: Simplify right side
    1,043.15x = 817,609.64
  5. Step 5: Solve for x
    x = 817,609.64/1,043.15
  6. Step 6: Final answer
    x = 783.79

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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.