Home / 1,156.36-1,734.72-426.40

Finding the Fourth Proportional to 1,156.36, 1,734.72 and 426.40

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Solution

The fourth proportional to 1,156.36, 1,734.72 and 426.40 is: 639.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.36 : 1,734.72 = 426.40 : x
  2. Step 2: Convert to fraction form
    1,156.36/1,734.72 = 426.40/x
  3. Step 3: Cross multiply
    1,156.36x = 1,734.72 × 426.40
  4. Step 4: Simplify right side
    1,156.36x = 739,684.61
  5. Step 5: Solve for x
    x = 739,684.61/1,156.36
  6. Step 6: Final answer
    x = 639.67

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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.