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Finding the Fourth Proportional to 933.69, 1,400.09 and 284.28

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Solution

The fourth proportional to 933.69, 1,400.09 and 284.28 is: 426.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.69 : 1,400.09 = 284.28 : x
  2. Step 2: Convert to fraction form
    933.69/1,400.09 = 284.28/x
  3. Step 3: Cross multiply
    933.69x = 1,400.09 × 284.28
  4. Step 4: Simplify right side
    933.69x = 398,016.16
  5. Step 5: Solve for x
    x = 398,016.16/933.69
  6. Step 6: Final answer
    x = 426.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.