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Finding the Fourth Proportional to 1,159.96, 1,739.68 and 379.84

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Solution

The fourth proportional to 1,159.96, 1,739.68 and 379.84 is: 569.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.96 : 1,739.68 = 379.84 : x
  2. Step 2: Convert to fraction form
    1,159.96/1,739.68 = 379.84/x
  3. Step 3: Cross multiply
    1,159.96x = 1,739.68 × 379.84
  4. Step 4: Simplify right side
    1,159.96x = 660,800.05
  5. Step 5: Solve for x
    x = 660,800.05/1,159.96
  6. Step 6: Final answer
    x = 569.67

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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.