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Finding the Fourth Proportional to 784.45, 1,082.73 and 453.07

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Solution

The fourth proportional to 784.45, 1,082.73 and 453.07 is: 625.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.45 : 1,082.73 = 453.07 : x
  2. Step 2: Convert to fraction form
    784.45/1,082.73 = 453.07/x
  3. Step 3: Cross multiply
    784.45x = 1,082.73 × 453.07
  4. Step 4: Simplify right side
    784.45x = 490,552.48
  5. Step 5: Solve for x
    x = 490,552.48/784.45
  6. Step 6: Final answer
    x = 625.35

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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.