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Finding the Fourth Proportional to 697.97, 1,045.46 and 620.07

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Solution

The fourth proportional to 697.97, 1,045.46 and 620.07 is: 928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.97 : 1,045.46 = 620.07 : x
  2. Step 2: Convert to fraction form
    697.97/1,045.46 = 620.07/x
  3. Step 3: Cross multiply
    697.97x = 1,045.46 × 620.07
  4. Step 4: Simplify right side
    697.97x = 648,255.28
  5. Step 5: Solve for x
    x = 648,255.28/697.97
  6. Step 6: Final answer
    x = 928.78

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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.