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Finding the Fourth Proportional to 939.37, 1,409.36 and 452.47

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Solution

The fourth proportional to 939.37, 1,409.36 and 452.47 is: 678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.37 : 1,409.36 = 452.47 : x
  2. Step 2: Convert to fraction form
    939.37/1,409.36 = 452.47/x
  3. Step 3: Cross multiply
    939.37x = 1,409.36 × 452.47
  4. Step 4: Simplify right side
    939.37x = 637,690.86
  5. Step 5: Solve for x
    x = 637,690.86/939.37
  6. Step 6: Final answer
    x = 678.85

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