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Finding the Fourth Proportional to 784.91, 1,083.03 and 453.35

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Solution

The fourth proportional to 784.91, 1,083.03 and 453.35 is: 625.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.91 : 1,083.03 = 453.35 : x
  2. Step 2: Convert to fraction form
    784.91/1,083.03 = 453.35/x
  3. Step 3: Cross multiply
    784.91x = 1,083.03 × 453.35
  4. Step 4: Simplify right side
    784.91x = 490,986.24
  5. Step 5: Solve for x
    x = 490,986.24/784.91
  6. Step 6: Final answer
    x = 625.54

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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.