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Finding the Fourth Proportional to 1,220.92, 1,830.92 and 562.40

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Solution

The fourth proportional to 1,220.92, 1,830.92 and 562.40 is: 843.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.92 : 1,830.92 = 562.40 : x
  2. Step 2: Convert to fraction form
    1,220.92/1,830.92 = 562.40/x
  3. Step 3: Cross multiply
    1,220.92x = 1,830.92 × 562.40
  4. Step 4: Simplify right side
    1,220.92x = 1,029,709.41
  5. Step 5: Solve for x
    x = 1,029,709.41/1,220.92
  6. Step 6: Final answer
    x = 843.39

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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.