Home / 1,155.90-1,733.82-386.40

Finding the Fourth Proportional to 1,155.90, 1,733.82 and 386.40

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Solution

The fourth proportional to 1,155.90, 1,733.82 and 386.40 is: 579.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.90 : 1,733.82 = 386.40 : x
  2. Step 2: Convert to fraction form
    1,155.90/1,733.82 = 386.40/x
  3. Step 3: Cross multiply
    1,155.90x = 1,733.82 × 386.40
  4. Step 4: Simplify right side
    1,155.90x = 669,948.05
  5. Step 5: Solve for x
    x = 669,948.05/1,155.90
  6. Step 6: Final answer
    x = 579.59

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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.