Home / 1,627.40-2,439.30-847.10

Finding the Fourth Proportional to 1,627.40, 2,439.30 and 847.10

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Solution

The fourth proportional to 1,627.40, 2,439.30 and 847.10 is: 1,269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.40 : 2,439.30 = 847.10 : x
  2. Step 2: Convert to fraction form
    1,627.40/2,439.30 = 847.10/x
  3. Step 3: Cross multiply
    1,627.40x = 2,439.30 × 847.10
  4. Step 4: Simplify right side
    1,627.40x = 2,066,331.03
  5. Step 5: Solve for x
    x = 2,066,331.03/1,627.40
  6. Step 6: Final answer
    x = 1,269.71

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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.