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Finding the Fourth Proportional to 1,712.76, 2,569.96 and 1,640.54

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Solution

The fourth proportional to 1,712.76, 2,569.96 and 1,640.54 is: 2,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.76 : 2,569.96 = 1,640.54 : x
  2. Step 2: Convert to fraction form
    1,712.76/2,569.96 = 1,640.54/x
  3. Step 3: Cross multiply
    1,712.76x = 2,569.96 × 1,640.54
  4. Step 4: Simplify right side
    1,712.76x = 4,216,122.18
  5. Step 5: Solve for x
    x = 4,216,122.18/1,712.76
  6. Step 6: Final answer
    x = 2,461.60

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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.