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Finding the Fourth Proportional to 1,569, 2,165.76 and 1,219.08

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Solution

The fourth proportional to 1,569, 2,165.76 and 1,219.08 is: 1,682.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569 : 2,165.76 = 1,219.08 : x
  2. Step 2: Convert to fraction form
    1,569/2,165.76 = 1,219.08/x
  3. Step 3: Cross multiply
    1,569x = 2,165.76 × 1,219.08
  4. Step 4: Simplify right side
    1,569x = 2,640,234.70
  5. Step 5: Solve for x
    x = 2,640,234.70/1,569
  6. Step 6: Final answer
    x = 1,682.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.