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Finding the Fourth Proportional to 734.96, 1,012.12 and 629.64

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Solution

The fourth proportional to 734.96, 1,012.12 and 629.64 is: 867.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.96 : 1,012.12 = 629.64 : x
  2. Step 2: Convert to fraction form
    734.96/1,012.12 = 629.64/x
  3. Step 3: Cross multiply
    734.96x = 1,012.12 × 629.64
  4. Step 4: Simplify right side
    734.96x = 637,271.24
  5. Step 5: Solve for x
    x = 637,271.24/734.96
  6. Step 6: Final answer
    x = 867.08

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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.