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Finding the Fourth Proportional to 737.12, 1,018.32 and 649.28

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Solution

The fourth proportional to 737.12, 1,018.32 and 649.28 is: 896.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.12 : 1,018.32 = 649.28 : x
  2. Step 2: Convert to fraction form
    737.12/1,018.32 = 649.28/x
  3. Step 3: Cross multiply
    737.12x = 1,018.32 × 649.28
  4. Step 4: Simplify right side
    737.12x = 661,174.81
  5. Step 5: Solve for x
    x = 661,174.81/737.12
  6. Step 6: Final answer
    x = 896.97

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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.