Home / 1,381.32-2,069.15-730.89

Finding the Fourth Proportional to 1,381.32, 2,069.15 and 730.89

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Solution

The fourth proportional to 1,381.32, 2,069.15 and 730.89 is: 1,094.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.32 : 2,069.15 = 730.89 : x
  2. Step 2: Convert to fraction form
    1,381.32/2,069.15 = 730.89/x
  3. Step 3: Cross multiply
    1,381.32x = 2,069.15 × 730.89
  4. Step 4: Simplify right side
    1,381.32x = 1,512,317.39
  5. Step 5: Solve for x
    x = 1,512,317.39/1,381.32
  6. Step 6: Final answer
    x = 1,094.83

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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.