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Finding the Fourth Proportional to 739.10, 1,020.10 and 444.42

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Solution

The fourth proportional to 739.10, 1,020.10 and 444.42 is: 613.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.10 : 1,020.10 = 444.42 : x
  2. Step 2: Convert to fraction form
    739.10/1,020.10 = 444.42/x
  3. Step 3: Cross multiply
    739.10x = 1,020.10 × 444.42
  4. Step 4: Simplify right side
    739.10x = 453,352.84
  5. Step 5: Solve for x
    x = 453,352.84/739.10
  6. Step 6: Final answer
    x = 613.38

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Half scale
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Double scale
Find fourth proportional to 740.10, 1,021.48 and 445.42
Similar ratio
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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.