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Finding the Fourth Proportional to 739.67, 1,109.95 and 328.86

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Solution

The fourth proportional to 739.67, 1,109.95 and 328.86 is: 493.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.67 : 1,109.95 = 328.86 : x
  2. Step 2: Convert to fraction form
    739.67/1,109.95 = 328.86/x
  3. Step 3: Cross multiply
    739.67x = 1,109.95 × 328.86
  4. Step 4: Simplify right side
    739.67x = 365,017.33
  5. Step 5: Solve for x
    x = 365,017.33/739.67
  6. Step 6: Final answer
    x = 493.49

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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.