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Finding the Fourth Proportional to 739.21, 1,019.94 and 424.45

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Solution

The fourth proportional to 739.21, 1,019.94 and 424.45 is: 585.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.21 : 1,019.94 = 424.45 : x
  2. Step 2: Convert to fraction form
    739.21/1,019.94 = 424.45/x
  3. Step 3: Cross multiply
    739.21x = 1,019.94 × 424.45
  4. Step 4: Simplify right side
    739.21x = 432,908.43
  5. Step 5: Solve for x
    x = 432,908.43/739.21
  6. Step 6: Final answer
    x = 585.64

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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.