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Finding the Fourth Proportional to 1,155.44, 1,733.24 and 386

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Solution

The fourth proportional to 1,155.44, 1,733.24 and 386 is: 579.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.44 : 1,733.24 = 386 : x
  2. Step 2: Convert to fraction form
    1,155.44/1,733.24 = 386/x
  3. Step 3: Cross multiply
    1,155.44x = 1,733.24 × 386
  4. Step 4: Simplify right side
    1,155.44x = 669,030.64
  5. Step 5: Solve for x
    x = 669,030.64/1,155.44
  6. Step 6: Final answer
    x = 579.03

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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.