Home / 1,156.68-1,734.45-386.64

Finding the Fourth Proportional to 1,156.68, 1,734.45 and 386.64

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Solution

The fourth proportional to 1,156.68, 1,734.45 and 386.64 is: 579.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.68 : 1,734.45 = 386.64 : x
  2. Step 2: Convert to fraction form
    1,156.68/1,734.45 = 386.64/x
  3. Step 3: Cross multiply
    1,156.68x = 1,734.45 × 386.64
  4. Step 4: Simplify right side
    1,156.68x = 670,607.75
  5. Step 5: Solve for x
    x = 670,607.75/1,156.68
  6. Step 6: Final answer
    x = 579.77

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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.