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Finding the Fourth Proportional to 1,178.58, 1,626.26 and 706.37

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Solution

The fourth proportional to 1,178.58, 1,626.26 and 706.37 is: 974.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.58 : 1,626.26 = 706.37 : x
  2. Step 2: Convert to fraction form
    1,178.58/1,626.26 = 706.37/x
  3. Step 3: Cross multiply
    1,178.58x = 1,626.26 × 706.37
  4. Step 4: Simplify right side
    1,178.58x = 1,148,741.28
  5. Step 5: Solve for x
    x = 1,148,741.28/1,178.58
  6. Step 6: Final answer
    x = 974.68

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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.