Home / 1,538.78-2,310.21-847.89

Finding the Fourth Proportional to 1,538.78, 2,310.21 and 847.89

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Solution

The fourth proportional to 1,538.78, 2,310.21 and 847.89 is: 1,272.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.78 : 2,310.21 = 847.89 : x
  2. Step 2: Convert to fraction form
    1,538.78/2,310.21 = 847.89/x
  3. Step 3: Cross multiply
    1,538.78x = 2,310.21 × 847.89
  4. Step 4: Simplify right side
    1,538.78x = 1,958,803.96
  5. Step 5: Solve for x
    x = 1,958,803.96/1,538.78
  6. Step 6: Final answer
    x = 1,272.96

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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.