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Finding the Fourth Proportional to 2,144.79, 3,218.99 and 847.17

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Solution

The fourth proportional to 2,144.79, 3,218.99 and 847.17 is: 1,271.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.79 : 3,218.99 = 847.17 : x
  2. Step 2: Convert to fraction form
    2,144.79/3,218.99 = 847.17/x
  3. Step 3: Cross multiply
    2,144.79x = 3,218.99 × 847.17
  4. Step 4: Simplify right side
    2,144.79x = 2,727,031.76
  5. Step 5: Solve for x
    x = 2,727,031.76/2,144.79
  6. Step 6: Final answer
    x = 1,271.47

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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.