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Finding the Fourth Proportional to 739.13, 1,108.76 and 219.11

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Solution

The fourth proportional to 739.13, 1,108.76 and 219.11 is: 328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.13 : 1,108.76 = 219.11 : x
  2. Step 2: Convert to fraction form
    739.13/1,108.76 = 219.11/x
  3. Step 3: Cross multiply
    739.13x = 1,108.76 × 219.11
  4. Step 4: Simplify right side
    739.13x = 242,933.76
  5. Step 5: Solve for x
    x = 242,933.76/739.13
  6. Step 6: Final answer
    x = 328.68

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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.