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Finding the Fourth Proportional to 734.03, 1,012.37 and 640.61

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Solution

The fourth proportional to 734.03, 1,012.37 and 640.61 is: 883.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.03 : 1,012.37 = 640.61 : x
  2. Step 2: Convert to fraction form
    734.03/1,012.37 = 640.61/x
  3. Step 3: Cross multiply
    734.03x = 1,012.37 × 640.61
  4. Step 4: Simplify right side
    734.03x = 648,534.35
  5. Step 5: Solve for x
    x = 648,534.35/734.03
  6. Step 6: Final answer
    x = 883.53

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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.