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Finding the Fourth Proportional to 933.72, 1,400.17 and 543.90

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Solution

The fourth proportional to 933.72, 1,400.17 and 543.90 is: 815.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.72 : 1,400.17 = 543.90 : x
  2. Step 2: Convert to fraction form
    933.72/1,400.17 = 543.90/x
  3. Step 3: Cross multiply
    933.72x = 1,400.17 × 543.90
  4. Step 4: Simplify right side
    933.72x = 761,552.46
  5. Step 5: Solve for x
    x = 761,552.46/933.72
  6. Step 6: Final answer
    x = 815.61

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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.