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Finding the Fourth Proportional to 739.48, 1,019.91 and 684.88

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Solution

The fourth proportional to 739.48, 1,019.91 and 684.88 is: 944.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.48 : 1,019.91 = 684.88 : x
  2. Step 2: Convert to fraction form
    739.48/1,019.91 = 684.88/x
  3. Step 3: Cross multiply
    739.48x = 1,019.91 × 684.88
  4. Step 4: Simplify right side
    739.48x = 698,515.96
  5. Step 5: Solve for x
    x = 698,515.96/739.48
  6. Step 6: Final answer
    x = 944.60

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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.