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Finding the Fourth Proportional to 2,688.98, 3,710.13 and 1,640.66

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Solution

The fourth proportional to 2,688.98, 3,710.13 and 1,640.66 is: 2,263.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.98 : 3,710.13 = 1,640.66 : x
  2. Step 2: Convert to fraction form
    2,688.98/3,710.13 = 1,640.66/x
  3. Step 3: Cross multiply
    2,688.98x = 3,710.13 × 1,640.66
  4. Step 4: Simplify right side
    2,688.98x = 6,087,061.89
  5. Step 5: Solve for x
    x = 6,087,061.89/2,688.98
  6. Step 6: Final answer
    x = 2,263.71

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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.