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Finding the Fourth Proportional to 842.70, 1,264.07 and 453.03

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Solution

The fourth proportional to 842.70, 1,264.07 and 453.03 is: 679.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.70 : 1,264.07 = 453.03 : x
  2. Step 2: Convert to fraction form
    842.70/1,264.07 = 453.03/x
  3. Step 3: Cross multiply
    842.70x = 1,264.07 × 453.03
  4. Step 4: Simplify right side
    842.70x = 572,658.02
  5. Step 5: Solve for x
    x = 572,658.02/842.70
  6. Step 6: Final answer
    x = 679.55

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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.