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Finding the Fourth Proportional to 1,721.70, 2,579.22 and 1,584

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Solution

The fourth proportional to 1,721.70, 2,579.22 and 1,584 is: 2,372.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.70 : 2,579.22 = 1,584 : x
  2. Step 2: Convert to fraction form
    1,721.70/2,579.22 = 1,584/x
  3. Step 3: Cross multiply
    1,721.70x = 2,579.22 × 1,584
  4. Step 4: Simplify right side
    1,721.70x = 4,085,484.48
  5. Step 5: Solve for x
    x = 4,085,484.48/1,721.70
  6. Step 6: Final answer
    x = 2,372.94

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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.