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Finding the Fourth Proportional to 1,260.05, 1,887.96 and 634.51

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Solution

The fourth proportional to 1,260.05, 1,887.96 and 634.51 is: 950.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.05 : 1,887.96 = 634.51 : x
  2. Step 2: Convert to fraction form
    1,260.05/1,887.96 = 634.51/x
  3. Step 3: Cross multiply
    1,260.05x = 1,887.96 × 634.51
  4. Step 4: Simplify right side
    1,260.05x = 1,197,937.31
  5. Step 5: Solve for x
    x = 1,197,937.31/1,260.05
  6. Step 6: Final answer
    x = 950.71

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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.