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Finding the Fourth Proportional to 1,792.32, 2,688.89 and 638.07

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Solution

The fourth proportional to 1,792.32, 2,688.89 and 638.07 is: 957.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.32 : 2,688.89 = 638.07 : x
  2. Step 2: Convert to fraction form
    1,792.32/2,688.89 = 638.07/x
  3. Step 3: Cross multiply
    1,792.32x = 2,688.89 × 638.07
  4. Step 4: Simplify right side
    1,792.32x = 1,715,696.85
  5. Step 5: Solve for x
    x = 1,715,696.85/1,792.32
  6. Step 6: Final answer
    x = 957.25

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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.