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Finding the Fourth Proportional to 734.60, 1,008.35 and 649.86

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Solution

The fourth proportional to 734.60, 1,008.35 and 649.86 is: 892.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.60 : 1,008.35 = 649.86 : x
  2. Step 2: Convert to fraction form
    734.60/1,008.35 = 649.86/x
  3. Step 3: Cross multiply
    734.60x = 1,008.35 × 649.86
  4. Step 4: Simplify right side
    734.60x = 655,283.08
  5. Step 5: Solve for x
    x = 655,283.08/734.60
  6. Step 6: Final answer
    x = 892.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.