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Finding the Fourth Proportional to 669.88, 1,003.56 and 525.16

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Solution

The fourth proportional to 669.88, 1,003.56 and 525.16 is: 786.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.88 : 1,003.56 = 525.16 : x
  2. Step 2: Convert to fraction form
    669.88/1,003.56 = 525.16/x
  3. Step 3: Cross multiply
    669.88x = 1,003.56 × 525.16
  4. Step 4: Simplify right side
    669.88x = 527,029.57
  5. Step 5: Solve for x
    x = 527,029.57/669.88
  6. Step 6: Final answer
    x = 786.75

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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.