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Finding the Fourth Proportional to 1,909.34, 2,863.80 and 522.80

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Solution

The fourth proportional to 1,909.34, 2,863.80 and 522.80 is: 784.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.34 : 2,863.80 = 522.80 : x
  2. Step 2: Convert to fraction form
    1,909.34/2,863.80 = 522.80/x
  3. Step 3: Cross multiply
    1,909.34x = 2,863.80 × 522.80
  4. Step 4: Simplify right side
    1,909.34x = 1,497,180.32
  5. Step 5: Solve for x
    x = 1,497,180.32/1,909.34
  6. Step 6: Final answer
    x = 784.14

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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.