Home / 1,156.81-1,734.37-426.40

Finding the Fourth Proportional to 1,156.81, 1,734.37 and 426.40

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Solution

The fourth proportional to 1,156.81, 1,734.37 and 426.40 is: 639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.81 : 1,734.37 = 426.40 : x
  2. Step 2: Convert to fraction form
    1,156.81/1,734.37 = 426.40/x
  3. Step 3: Cross multiply
    1,156.81x = 1,734.37 × 426.40
  4. Step 4: Simplify right side
    1,156.81x = 739,535.37
  5. Step 5: Solve for x
    x = 739,535.37/1,156.81
  6. Step 6: Final answer
    x = 639.29

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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.