Home / 2,147.16-3,218.58-847.32

Finding the Fourth Proportional to 2,147.16, 3,218.58 and 847.32

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Solution

The fourth proportional to 2,147.16, 3,218.58 and 847.32 is: 1,270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.16 : 3,218.58 = 847.32 : x
  2. Step 2: Convert to fraction form
    2,147.16/3,218.58 = 847.32/x
  3. Step 3: Cross multiply
    2,147.16x = 3,218.58 × 847.32
  4. Step 4: Simplify right side
    2,147.16x = 2,727,167.21
  5. Step 5: Solve for x
    x = 2,727,167.21/2,147.16
  6. Step 6: Final answer
    x = 1,270.13

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1.5x scale

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.