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Finding the Fourth Proportional to 1,138.74, 1,707.57 and 590.37

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Solution

The fourth proportional to 1,138.74, 1,707.57 and 590.37 is: 885.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.74 : 1,707.57 = 590.37 : x
  2. Step 2: Convert to fraction form
    1,138.74/1,707.57 = 590.37/x
  3. Step 3: Cross multiply
    1,138.74x = 1,707.57 × 590.37
  4. Step 4: Simplify right side
    1,138.74x = 1,008,098.10
  5. Step 5: Solve for x
    x = 1,008,098.10/1,138.74
  6. Step 6: Final answer
    x = 885.28

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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.