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Finding the Fourth Proportional to 933.47, 1,400.21 and 284.21

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Solution

The fourth proportional to 933.47, 1,400.21 and 284.21 is: 426.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.47 : 1,400.21 = 284.21 : x
  2. Step 2: Convert to fraction form
    933.47/1,400.21 = 284.21/x
  3. Step 3: Cross multiply
    933.47x = 1,400.21 × 284.21
  4. Step 4: Simplify right side
    933.47x = 397,957.90
  5. Step 5: Solve for x
    x = 397,957.90/933.47
  6. Step 6: Final answer
    x = 426.32

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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.