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Finding the Fourth Proportional to 1,138.10, 1,707.14 and 625.10

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Solution

The fourth proportional to 1,138.10, 1,707.14 and 625.10 is: 937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.10 : 1,707.14 = 625.10 : x
  2. Step 2: Convert to fraction form
    1,138.10/1,707.14 = 625.10/x
  3. Step 3: Cross multiply
    1,138.10x = 1,707.14 × 625.10
  4. Step 4: Simplify right side
    1,138.10x = 1,067,133.21
  5. Step 5: Solve for x
    x = 1,067,133.21/1,138.10
  6. Step 6: Final answer
    x = 937.64

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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.