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Finding the Fourth Proportional to 737.16, 1,105.38 and 420.51

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Solution

The fourth proportional to 737.16, 1,105.38 and 420.51 is: 630.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.16 : 1,105.38 = 420.51 : x
  2. Step 2: Convert to fraction form
    737.16/1,105.38 = 420.51/x
  3. Step 3: Cross multiply
    737.16x = 1,105.38 × 420.51
  4. Step 4: Simplify right side
    737.16x = 464,823.34
  5. Step 5: Solve for x
    x = 464,823.34/737.16
  6. Step 6: Final answer
    x = 630.56

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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.