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Finding the Fourth Proportional to 739.98, 1,021.16 and 429.48

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Solution

The fourth proportional to 739.98, 1,021.16 and 429.48 is: 592.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.98 : 1,021.16 = 429.48 : x
  2. Step 2: Convert to fraction form
    739.98/1,021.16 = 429.48/x
  3. Step 3: Cross multiply
    739.98x = 1,021.16 × 429.48
  4. Step 4: Simplify right side
    739.98x = 438,568.87
  5. Step 5: Solve for x
    x = 438,568.87/739.98
  6. Step 6: Final answer
    x = 592.68

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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.