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Finding the Fourth Proportional to 669.63, 1,003.23 and 525.06

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Solution

The fourth proportional to 669.63, 1,003.23 and 525.06 is: 786.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.63 : 1,003.23 = 525.06 : x
  2. Step 2: Convert to fraction form
    669.63/1,003.23 = 525.06/x
  3. Step 3: Cross multiply
    669.63x = 1,003.23 × 525.06
  4. Step 4: Simplify right side
    669.63x = 526,755.94
  5. Step 5: Solve for x
    x = 526,755.94/669.63
  6. Step 6: Final answer
    x = 786.64

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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.