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Finding the Fourth Proportional to 1,447.45, 1,997.45 and 784.29

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Solution

The fourth proportional to 1,447.45, 1,997.45 and 784.29 is: 1,082.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.45 : 1,997.45 = 784.29 : x
  2. Step 2: Convert to fraction form
    1,447.45/1,997.45 = 784.29/x
  3. Step 3: Cross multiply
    1,447.45x = 1,997.45 × 784.29
  4. Step 4: Simplify right side
    1,447.45x = 1,566,576.14
  5. Step 5: Solve for x
    x = 1,566,576.14/1,447.45
  6. Step 6: Final answer
    x = 1,082.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.