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Finding the Fourth Proportional to 671.45, 1,003.33 and 503.57

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Solution

The fourth proportional to 671.45, 1,003.33 and 503.57 is: 752.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.45 : 1,003.33 = 503.57 : x
  2. Step 2: Convert to fraction form
    671.45/1,003.33 = 503.57/x
  3. Step 3: Cross multiply
    671.45x = 1,003.33 × 503.57
  4. Step 4: Simplify right side
    671.45x = 505,248.14
  5. Step 5: Solve for x
    x = 505,248.14/671.45
  6. Step 6: Final answer
    x = 752.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.