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Finding the Fourth Proportional to 739.45, 1,020.18 and 444.61

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Solution

The fourth proportional to 739.45, 1,020.18 and 444.61 is: 613.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.45 : 1,020.18 = 444.61 : x
  2. Step 2: Convert to fraction form
    739.45/1,020.18 = 444.61/x
  3. Step 3: Cross multiply
    739.45x = 1,020.18 × 444.61
  4. Step 4: Simplify right side
    739.45x = 453,582.23
  5. Step 5: Solve for x
    x = 453,582.23/739.45
  6. Step 6: Final answer
    x = 613.40

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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.