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Finding the Fourth Proportional to 737.92, 1,018.28 and 423.20

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Solution

The fourth proportional to 737.92, 1,018.28 and 423.20 is: 583.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.92 : 1,018.28 = 423.20 : x
  2. Step 2: Convert to fraction form
    737.92/1,018.28 = 423.20/x
  3. Step 3: Cross multiply
    737.92x = 1,018.28 × 423.20
  4. Step 4: Simplify right side
    737.92x = 430,936.10
  5. Step 5: Solve for x
    x = 430,936.10/737.92
  6. Step 6: Final answer
    x = 583.99

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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.