Home / 1,156.50-1,734.90-426.15

Finding the Fourth Proportional to 1,156.50, 1,734.90 and 426.15

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Solution

The fourth proportional to 1,156.50, 1,734.90 and 426.15 is: 639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.50 : 1,734.90 = 426.15 : x
  2. Step 2: Convert to fraction form
    1,156.50/1,734.90 = 426.15/x
  3. Step 3: Cross multiply
    1,156.50x = 1,734.90 × 426.15
  4. Step 4: Simplify right side
    1,156.50x = 739,327.64
  5. Step 5: Solve for x
    x = 739,327.64/1,156.50
  6. Step 6: Final answer
    x = 639.28

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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.