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Finding the Fourth Proportional to 1,807.13, 2,709.38 and 1,220.68

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Solution

The fourth proportional to 1,807.13, 2,709.38 and 1,220.68 is: 1,830.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.13 : 2,709.38 = 1,220.68 : x
  2. Step 2: Convert to fraction form
    1,807.13/2,709.38 = 1,220.68/x
  3. Step 3: Cross multiply
    1,807.13x = 2,709.38 × 1,220.68
  4. Step 4: Simplify right side
    1,807.13x = 3,307,285.98
  5. Step 5: Solve for x
    x = 3,307,285.98/1,807.13
  6. Step 6: Final answer
    x = 1,830.13

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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.